Updated on 2026/03/04

写真a

 
TAKEUCHI Nozomi
 
Organization
School of Engineering Associate Professor
Title
Associate Professor
External link

Degree

  • Doctor (Engineering) ( 2009.3   Tokyo Institute of Technology )

Research Interests

  • Electrohydrodynamic effects and their applications Non-equilibrium plasmas in water

  • 気液界面プラズマの水処理・材料応用，電気流体力学効果とその応用，直流遮断器

Research Areas

  • Nanotechnology/Materials / Nanomaterials  / 触媒，電極材料

  • Energy Engineering / Fundamental plasma  / プラズマ応用

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Power engineering  / 高電圧・大電流機器

Education

  • Tokyo Institute of Technology   Graduate School of Science and Engineering   Department of Electrical and Electronic Engineering

    2007.4 - 2009.3

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    Country： Japan

    Notes： Doctoral Course

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  • Tokyo Institute of Technology   Graduate School of Science and Engineering   Department of Electrical and Electronic Engineering

    2005.4 - 2007.3

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    Country： Japan

    Notes： Master Course

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  • Tokyo Institute of Technology   School of Engineering   Department of Electrical and Electronic Engineering

    2001.4 - 2005.3

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Research History

  • Institute of Science Tokyo   Associate Professor

    2024.10

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  • Tokyo Institute of Technology   Department of Electrical and Electronic Engineering   Associate Professor

    2019.4 - 2024.9

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  • National Institute of Advanced Industrial Science and Technology   Environmental Management Research Institute   Senior Researcher

    2017.4 - 2019.3

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  • Tokyo Institute of Technology   Department of Electrical and Electronic Engineering   Visiting Associate Professor

    2017.4 - 2019.3

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  • Tokyo Institute of Technology   Department of Electrical and Electronic Engineering   Associate Professor

    2017.2 - 2017.3

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  • Tokyo Institute of Technology   Department of Electrical and Electronic Engineering   Lecturer

    2016.4 - 2017.1

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  • Tokyo Institute of Technology   Department of Electrical and Electronic Engineering   Lecturer

    2012.12 - 2016.3

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  • Tokyo Institute of Technology   Department of Electrical and Electronic Engineering   Assistant Professor

    2009.10 - 2012.11

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  • Tokyo Institute of Technology   Department of Electrical and Electronic Engineering   Research associate

    2009.4 - 2009.9

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  • Japan Society for the Promotion of Science

    2009.4 - 2009.9

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  • Japan Society for the Promotion of Science

    2008.4 - 2009.3

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Professional Memberships

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Committee Memberships

  • 電気学会   電磁界応答流体の先進融合技術に関する調査専門委員会 幹事  

    2025.7   

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    Committee type：Academic society

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  • 応用物理学会   プラズマエレクトロニクス分科会 副幹事長  

    2024.4 - 2027.3   

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  • 静電気学会   編集委員会 委員  

    2024.1   

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    Committee type：Academic society

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  • 文部科学省   学術調査官（科学研究費補助金担当）  

    2023.8 - 2025.7   

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    Committee type：Government

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  • 電気学会   放電・プラズマ・パルスパワーにおける計測技術の現状と将来について調査専門委員会 幹事  

    2023.4   

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    Committee type：Academic society

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  • 電気学会   電磁界応答流体を基盤としたエネルギー・環境先進技術に関する調査専門委員会 幹事  

    2022.7 - 2025.6   

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    Committee type：Academic society

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  • 電気学会   教育支援部会 部会長  

    2022.5   

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    Committee type：Academic society

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  • IEEE Nuclear and Plasma Science Society Japan Chanpter (NPS-05)   Chair  

    2022.1   

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  • 日本機械学会   機能性流体工学研究会 委員  

    2021.4   

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    Committee type：Academic society

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  • 応用物理学会   プラズマエレクトロニクス分科会 幹事  

    2021.4 - 2023.3   

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    Committee type：Academic society

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  • 電気学会   放電・プラズマ・パルスパワー技術委員会 委員  

    2020.6   

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  • 静電気学会   静電気・高電圧・放電・プラズマ若手研究委員会 幹事  

    2020.3   

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    Committee type：Academic society

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  • IEEE Nuclear and Plasma Science Society Japan Chanpter (NPS-05)   Vice Chair  

    2020.1 - 2021.12   

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    Committee type：Academic society

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  • 電気学会   電磁界応答流体によるエネルギー・環境技術の新展開に関する調査専門委員会 委員  

    2019.7 - 2022.6   

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    Committee type：Academic society

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  • 電気学会   基礎・材料・共通部門編修委員会 幹事  

    2019.4 - 2021.3   

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    Committee type：Academic society

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  • 電気学会   プラズマ材料表面処理技術の動向調査専門委員会 委員  

    2019.1 - 2021.12   

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    Committee type：Academic society

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  • 日本学術振興会   プラズマ材料科学第153委員会 運営委員  

    2018.4 - 2023.3   

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    Committee type：Academic society

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  • 静電気学会   理事  

    2018   

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    Committee type：Academic society

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  • 日本オゾン協会   オゾン発生器認定委員会 委員  

    2018   

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    Committee type：Academic society

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  • 日本オゾン協会   学術・公益部会 委員  

    2018   

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    Committee type：Academic society

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  • プラズマ・核融合学会   編集委員会 委員  

    2017 - 2019   

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    Committee type：Academic society

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  • 電気学会   教育支援部会 委員  

    2016 - 2022.5   

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    Committee type：Academic society

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  • 静電気学会   放電プラズマによる水処理研究委員会 幹事  

    2015 - 2023.12   

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    Committee type：Academic society

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  • 電気学会   プラズマ技術委員会 幹事  

    2015 - 2017   

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    Committee type：Academic society

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  • 応用物理学会   プラズマエレクトロニクス分科会 幹事  

    2015 - 2017   

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    Committee type：Academic society

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  • 電気学会   放電技術委員会 放電・プラズマ気相シミュレーション技法調査専門委員会 幹事  

    2014 - 2017   

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    Committee type：Academic society

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  • 電気学会   東京支部 協議員  

    2013 - 2015   

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    Committee type：Academic society

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  • 電気学会   プラズマ技術委員会 液界面プラズマの実験・計算モデル標準化調査専門委員会 委員  

    2011 - 2014   

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    Committee type：Academic society

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  • 電気学会   プラズマ技術委員会 幹事補佐  

    2010 - 2013   

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    Committee type：Academic society

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  • 電気学会   基礎・材料・共通部門編修委員会 幹事補佐  

    2010 - 2012   

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    Committee type：Academic society

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  • 電気学会   プラズマ技術委員会 プラズマによる水処理・水高機能化と水界面における反応過程調査専門委員会 幹事補佐  

    2009 - 2011   

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    Committee type：Academic society

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Papers

  • Bidirectional effects and kinetics of plasma-activated water on Botrytis cinerea spores under optimized DBD conditions

    Dingmeng Guo, Xiaoning Zhang, Hongxia Liu, Yixin Shi, Qianzi Yao, Weina Hao, Xiaoqin Ma, Rui Fan, Zhentao Tu, Nozomi Takeuchi

    Journal of Physics D: Applied Physics   2026.3

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1088/1361-6463/ae475c

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  • Atmospheric Pressure Plasma for Carbon Material Modification and Synthesis: A Comprehensive Review

    Siqi Deng, Nozomi Takeuchi, Toshiro Kaneko

    Materials   2025.12

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.3390/ma18245662

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  • Green Technique for Producing Carbon-Based Catalysts for Cellulose Hydrolysis

    Siqi Deng, Kaixun Yao, Manabu Kodama, Oi Lun Li, Nozomi Takeuchi

    Materials   2025.11

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.3390/ma18215031

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  • Accurate detection and high throughput profiling of unknown PFAS transformation products for elucidating degradation pathways Reviewed International coauthorship International journal

    Bei Zhang, Jibao Liu, Shanshan Qing, Thilini Maheshika Herath, Huan Zhao, Supaporn Klabklaydee, Qing-Long Fu, Eunsang Kwon, Nozomi Takeuchi, Douyan Wang, Takao Namihira, Toshihiro Isobe, Yanrong Zhang, Xiaoying Zhu, Baoliang Chen, Mohamed Ateia, Manabu Fujii

    Water Research   282   123645 - 123645   2025.4

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

    DOI： 10.1016/j.watres.2025.123645

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  • Effect of low-pressure plasma-induced NO, OH, and NH reactive species on radish seedling growth Reviewed International journal

    Pankaj Attri, Shinjiro Ono, Takamasa Okumura, Nozomi Takeuchi, Kazunori Koga, Masaharu Shiratani

    Plasma Physics and Controlled Fusion   67 ( 4 )   045004 - 045004   2025.3

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：IOP Publishing  

    Abstract

    Plasma agriculture has recently gained tremendous attention to increase seed germination, seedling growth, and yield. Several factors influence plasma’s negative and positive effects on seeds. One of the major factors is the role of plasma-generated reactive nitrogen species (RNS). To unlock the role of RNS on the seeds, we treated the radish seeds using low-pressure RF plasma with N2 as a feed gas for different treatment times. We used the radish seeds with two different seed coat colours (brown and grey) and treated them under two conditions (dry and wet). In the present study, we want to analyse the possible role of seed coat colour, humidity, and plasma treatment time on seed germination and seedling growth. We observed that humidity and plasma treatment time affected the seedling growth for the wet seeds. There was no change in the seed germination rate or total germination percentage for both dry and wet seeds. We conducted electron paramagnetic resonance spectroscopy to analyse the increased concentration of organic radicals in radish seeds after plasma treatment. Additionally, we used optical emission spectroscopy (OES) to investigate the generation of reactive species in the plasma reactor with both dry and wet seeds. We also explored OES measurements without seeds, using N2 and air as feed gases at different pressures (100, 150, and 200 Pa). The OES spectra revealed that elevated concentrations of NO, OH, and NH in the wet seeds were responsible for the enhanced radish growth.

    DOI： 10.1088/1361-6587/adba0f

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    Other Link： https://iopscience.iop.org/article/10.1088/1361-6587/adba0f/pdf

  • Analysis of Nitrogen Fixation Characteristics in Water with Plasma in Underwater Air Bubbles Reviewed

    H. Gao, W. Zhang, N. Takeuchi

    Journal of the Institute of Electrostatics Japan   49 ( 6 )   2025

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  • Experimental and theoretical study on reactive oxygen and nitrogen species generation in plasma bubbles with ammonia solution Reviewed International journal

    Siqi Deng, Wenwu Xing, Takeru Sato, Shungo Zen, Nozomi Takeuchi

    Plasma Processes and Polymers   2024.6

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    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/ppap.202300223

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  • Plasma candle with a hollow dielectric cylinder for a wide and stable jet Reviewed International journal

    Ayman A. Abdelaziz, Nozomi Takeuchi, Yoshiyuki Teramoto, Hyun-Ha Kim

    International Journal of Plasma Environmental Science and Technology   18 ( 1 )   e01004   2024.4

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.34343/ijpest.2024.18.e01004

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  • Development of Paint Coatings for Lightning Protection on Wind Turbine Blades Reviewed

    Yuki OKEGAWA, Shungo ZEN, Nozomi TAKEUCHI, Yuya SUZUKI, Tetsuya AKIMOTO

    Journal of Occupational Safety and Health   17 ( 1 )   19 - 26   2024.2

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    Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：National Institute of Industrial Health  

    DOI： 10.2486/josh.josh-2023-0014-ge

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  • Ammonia synthesis using atmospheric pressure fluidized bed plasma Reviewed International journal

    Shungo Zen, Nozomi Takeuchi, Yoshiyuki Teramoto

    Journal of Physics D: Applied Physics   57 ( 11 )   115203 - 115203   2023.12

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：IOP Publishing  

    Abstract

    In recent years, extensive research has been conducted on ammonia synthesis using catalysts under mild conditions and by combining plasma with the catalysts. Increasing the contact area between the catalyst surface and atmospheric pressure dielectric barrier discharge (DBD) is crucial for improving the ammonia synthesis efficiency. In this study, we present a fluidized bed dielectric barrier discharge (FB-DBD) method that can be used to form FB-DBD plasma through the electrohydrodynamics of DBD discharge without a feed gas. We performed ammonia synthesis experiments using our FB-DBD reactor. The results indicate that the FB-DBD plasma can achieve an energy yield of 5.9 g-NH3/kWh, which is about twice higher than that of conventional DBD plasma. Consequently, it can be implemented in various applications as a new reaction field between solids and gases where surface reactions are predominant.

    DOI： 10.1088/1361-6463/ad144b

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    Other Link： https://iopscience.iop.org/article/10.1088/1361-6463/ad144b/pdf

  • Role of Direct Plasma Irradiation, Plasma-Activated Liquid, and Plasma-Treated Soil in Plasma Agriculture Reviewed International coauthorship International journal

    Pankaj Attri, Takamasa Okumura, Nozomi Takeuchi, Jamoliddin Razzokov, Quanzhi Zhang, Kunihiro Kamataki, Masaharu Shiratani, Kazunori Koga

    Plasma Medicine   13 ( 3 )   33 - 52   2023.12

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Begell House  

    <p>Seed treatment with non-thermal plasma has seen a tremendous increase in both direct and indirect applications recently. In this review, we examined the effects of direct plasma irradiation, plasma-activated water (PAW), plasma-activated Ringer's lactate solution, and plasma-treated soil on seeds, resulting in positive, negative, and neutral changes. Furthermore, we will compare the impact of pressure and feed gases on seed germination and seedling growth. Additionally, we focused on the types of reactive oxygen and nitrogen species (RONS) and their concentrations produced in the gas and liquid phases, as these play a crucial role in germination percentage and seedling growth. In conclusion, we find that plasma agriculture's success is contingent on seed morphology, the types and concentrations of reactive species, and specific plasma characteristics.</p>

    DOI： 10.1615/plasmamed.2023050454

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  • Influence of humidity on the plasma-assisted CO2 conversion Reviewed

    Pankaj Attri, Takamasa Okumura, Nozomi Takeuchi, Kunihiro Kamataki, Kazunori Koga, Masaharu Shiratani

    Plasma Processes and Polymers   21 ( 1 )   e2300141   2023.10

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Wiley  

    Abstract

    The current research focuses on carbon dioxide (CO2) conversion at ambient conditions using streamer plasma. In this study, treatment time and humidity have been found to influence CO2 conversion. Our findings reveal a maximum CO2 conversion rate of 35.2%, achieved with a remarkably high energy efficiency of CO2 conversion at 135% and a low energy cost of 2.17 eV/molecule. We employed optical emission and fourier‐transform infrared spectroscopy spectroscopy to analyze the different dissociation products of CO2 and determine the percentage of CO2 conversion. Furthermore, we utilized a two‐dimensional (2D) fluid dynamics model and a zero‐dimensional (0D) chemistry model to gain insights into the reactor mechanism.

    DOI： 10.1002/ppap.202300141

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  • Plasma-assisted CO2 and N2 conversion to plant nutrient Reviewed

    Pankaj Attri, Takamasa Okumura, Nozomi Takeuchi, Kunihiro Kamataki, Kazunori Koga, Masaharu Shiratani

    Frontiers in Physics   11   2023.7

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Frontiers Media SA  

    DOI： 10.3389/fphy.2023.1211166

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  • Investigations on plasma parameters of diaphragm discharge plasma based on optical emission spectroscopy Reviewed

    Taichi Watanabe, Shungo Zen, Nozomi Takeuchi

    Japanese Journal of Applied Physics   62 ( SL )   SL1006 - SL1006   2023.5

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    Authorship：Last author   Publishing type：Research paper (scientific journal)   Publisher：IOP Publishing  

    Abstract

    As a plasma-based method, diaphragm discharge plasma, an underwater discharge, exhibits a relatively high production rate and efficiency of hydrogen peroxide (H2O2). This study aimed to characterize the energetic state of plasma and the H2O2 production mechanism by optical emission spectroscopy, evaluating the excitation temperature, gas temperature, electron density, and their temporal variations. The excitation temperature was approximately 3000 K, which was also presumed to almost coincide with the electron temperature in the plasma. The gas temperature was approximately 2500 K, and the electron density was approximately 6 × 1022 m−3 at maximum. The electron density sustained higher values under the condition of better H2O2 production performance, whereas the other two parameters exhibited almost no difference and variation. The reaction rate calculation based on the observation results indicated that the thermal dissociation of H2O is a more crucial reaction path for H2O2 production in our plasma than expected.

    DOI： 10.35848/1347-4065/accbc8

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    Other Link： https://iopscience.iop.org/article/10.35848/1347-4065/accbc8/pdf

  • コロナ放電方式交流イオナイザにおける金属グリッドを用いた誘導電位の抑制 Reviewed

    山口晋一, 中田江理子, 内御堂駆, 高橋克幸, 高木浩一, 竹内希, 永田秀海, 榎本洋介

    静電気学会誌   47 ( 3 )   114 - 120   2023.5

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.34342/iesj.2023.47.3.114

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  • Effect of ozone and humidity addition on hydrogen peroxide generation characteristics of plasmas in oxygen bubbles Reviewed

    Ryota Kazama, Taichi Watanabe, Shungo Zen, Nozomi Takeuchi

    Journal of Vacuum Science &amp; Technology A   40 ( 6 )   2022.11

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    Authorship：Last author,　Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：American Vacuum Society  

    The effects of addition of ozone (O3) and humidity on oxygen (O2) bubbles during hydrogen peroxide (H2O2) generation by AC plasmas in the bubbles were investigated. The best H2O2 generation characteristics, with a generation rate and an efficiency of 161 mg/h and 1.74 g/kWh, respectively, were achieved when humidified O3 was used with ballast capacitors of 100 pF at 3 kHz. Zero-dimensional simulations of gas-phase reactions with different water vapor concentrations were performed to investigate the H2O2 generation reactions. It was confirmed that the use of humidified O3 contributed to hydrogen peroxide formation by enhancing OH radical generation via reactions involving O, H, and HO2 radicals.

    DOI： 10.1116/6.0001861

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  • Investigation of the sulfonation mechanism by gas–liquid interfacial plasma under atmospheric pressure conditions Reviewed

    Siqi Deng, Nozomi Takeuchi, Junko Hieda, Katsuyuki Takahashi, Kosuke Tachibana, Oi Lun Li

    Journal of Physics D: Applied Physics   55 ( 34 )   345205 - 345205   2022.8

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：{IOP} Publishing  

    Abstract

    Although sulfonated carbon catalysts are considered promising solid acid catalysts for cellulose conversion, most carbon sulfonation processes require concentrated sulfuric acid (18 M) at elevated temperatures. This work investigates a novel sulfonation mechanism for carbon acid catalysts via a gas–liquid interfacial plasma sulfonation system under atmospheric pressure conditions with a dilute sulfuric acid solution (1 M) at 38 °C, and the by-products of the plasma sulfonation process were investigated by in-situ and ex-situ diagnosis. The results show that a high gas temperature (&gt;1050 K) around the plasma allows H2SO4 droplet decomposition, and active species (•OH, SO3, and HOSO2•) generated at the gas–liquid interface were grafted on the defects of the carbon materials and subsequently formed sulfonic acid groups (0.36 mmol g−1) and total acid groups (4.16 mmol g−1) on the carbon network. This study aimed to provide significant insight into the understanding of the sulfonation mechanisms of an emerging plasma-based process for carbon acid catalysts, which is important for the further development of an environmentally friendly sulfonation process for acid catalysts for biomass conversion.

    DOI： 10.1088/1361-6463/ac73c2

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    Other Link： https://iopscience.iop.org/article/10.1088/1361-6463/ac73c2/pdf

  • Dependence of Discharge Conditions on Characteristics of Nano-Carbon Material Synthesized by Plasma in Liquid Reviewed

    Shoya Yamazaki, Nozomi Takeuchi, Hidemasa Takana

    IEEJ Transactions on Fundamentals and Materials   142 ( 3 )   59 - 66   2022.3

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    Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：Institute of Electrical Engineers of Japan (IEE Japan)  

    DOI： 10.1541/ieejfms.142.59

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  • 水面上プラズマによる液中過酸化水素生成のシミュレーション Invited

    Nozomi Takeuchi

    計算工学   27 ( 1 )   4380 - 4382   2022.1

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    Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)  

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  • Effects of initial surfactant concentration on plasma-induced liquid flows Reviewed

    Toshiyuki Kawasaki, Masahiro Kamasaki, Nozomi Takeuchi, Fumiaki Mitsugi

    Journal of Applied Physics   130 ( 24 )   243303 - 243303   2021.12

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：AIP Publishing  

    DOI： 10.1063/5.0071217

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  • Towards launching a stable wide plasma jet from a single tube: I. The importance of controlling the gas dynamics Reviewed

    Ayman A Abdelaziz, Hyun-Ha Kim, Yoshiyuki Teramoto, Nozomi Takeuchi

    Journal of Physics D: Applied Physics   54 ( 39 )   395203 - 395203   2021.9

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：{IOP} Publishing  

    DOI： 10.1088/1361-6463/ac0eb4

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    Other Link： https://iopscience.iop.org/article/10.1088/1361-6463/ac0eb4/pdf

  • Multifunctional Disordered Sulfur-Doped Carbon for Efficient Sodium-Ion-Exchange and 2-Electron-Transfer-Dominant Oxygen Reduction Reaction Reviewed

    Hanvin Kim, Hyeonsu Yang, Jun Kang, Nozomi Takeuchi

    Carbon   182   242 - 253   2021.9

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier {BV}  

    DOI： 10.1016/j.carbon.2021.05.063

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  • Insights into oxygen reduction reaction on pristine carbon nanoparticles synthesized by the plasma-in-liquid process Reviewed

    Hanvin Kim, Nozomi Takeuchi

    Electrochimica Acta   390   138882 - 138882   2021.9

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    Publishing type：Research paper (scientific journal)   Publisher：Elsevier {BV}  

    DOI： 10.1016/j.electacta.2021.138882

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  • 多並列ダイヤフラム放電による過酸化水素生成特性 Reviewed

    Nozomi Takeuchi

    静電気学会誌   45 ( 4 )   155 - 160   2021.7

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.34342/iesj.2021.45.4.155

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  • Abatement of perfluorocarbons using direct current plasma generated in gas bubbles in water Reviewed

    Matsuya, Yuriko, Miyazawa, Ryota, Ikeda, Kei, Takeuchi, Nozomi, Yasuoka, Koichi

    International Journal of Plasma Environmental Science and Technology   15 ( 2 )   e02006   2021.6

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.34343/ijpest.2021.15.e02006

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  • Multi-stage synthesis of magnesium nitride using an atmospheric-pressure dielectric barrier discharge Reviewed

    S. Zen, Y. Huan, N. Takeuchi

    International Journal of Plasma Environmental Science and Technology   15 ( 2 )   e02002   2021.5

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.34343/ijpest.2021.15.e02002

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  • N2/Ar plasma-induced surface sulfonation on graphene nanoplatelets for catalytic hydrolysis of cellulose to glucose Reviewed

    Lusha Qin, Nozomi Takeuchi, Katsuyuki Takahashi, Jun Kang, Kwang Ho Kim, Oi Lun Li

    Applied Surface Science   545   149051 - 149051   2021.4

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    Publishing type：Research paper (scientific journal)   Publisher：Elsevier {BV}  

    DOI： 10.1016/j.apsusc.2021.149051

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  • Insights into Electrocatalytic Oxygen Reduction Via a Dominant Two-Electron-Transfer Process on Sulfur-Doped Disordered Carbon Reviewed

    Hanvin Kim, Nozomi Takeuchi

    The Journal of Physical Chemistry C   125 ( 10 )   5793 - 5801   2021.3

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    DOI： 10.1021/acs.jpcc.0c10771

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  • Green route for ammonium nitrate synthesis: fertilizer for plant growth enhancement Reviewed

    Pankaj Attri, Kazunori Koga, Takamasa Okumura, Nozomi Takeuchi, Masaharu Shiratani

    RSC Advances   11 ( 46 )   28521 - 28529   2021

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    Green route for synthesis of ammonium nitrate fertilizer and used plasma N-enriched soil for plants (radish and tomato) growth.

    DOI： 10.1039/D1RA04441A

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  • Novel Approach Through the Harmonized Sulfur in Disordered Carbon Structure for High-Efficiency Sodium-Ion Exchange Reviewed

    Hanvin Kim, Dae-Yeong Kim, Shungo Zen, Jun Kang, Nozomi Takeuchi

    ACS Applied Materials & Interfaces   12 ( 39 )   43750 - 43760   2020.9

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    DOI： 10.1021/acsami.0c12677

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  • ON-State Contact Resistance and Arc-Less Commutation Characteristics of Cu-W Clad Contact Materials in a Hybrid DC Switch Reviewed

    Mo Chen, Yuta Yamada, Shungo Zen, Nozomi Takeuchi, Koichi Yasuoka

    IEEE Transactions on Components, Packaging and Manufacturing Technology   10 ( 7 )   1138 - 1147   2020.7

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    DOI： 10.1109/TCPMT.2020.3001280

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  • Green Sulfonation of Carbon Catalysts via Gas–Liquid Interfacial Plasma for Cellulose Hydrolysis Reviewed

    Lusha Qin, Takahiro Ishizaki, Nozomi Takeuchi, Katsuyuki Takahashi, Kwang Ho Kim, Oi Lun Li

    ACS Sustainable Chemistry & Engineering   8 ( 15 )   5837 - 5846   2020.4

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    DOI： 10.1021/acssuschemeng.9b07156

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  • Observation of solution plasma in water–ethanol mixed solution for reduction of graphene oxide Reviewed

    Nozomi Takeuchi

    International Journal of Plasma Environmental Science and Technology   14 ( 1 )   e01009   2020

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    DOI： 10.34343/ijpest.2020.14.e01009

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  • Plasma-assisted cellulose conversion to soluble saccharide Reviewed

    Oi Lun Helena Li, Nozomi Takeuchi, Ishizaki Takahiro

    International Journal of Plasma Environmental Science and Technology   14 ( 1 )   e01005 - 9   2020

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    DOI： 10.34343/ijpest.2020.14.e01005

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  • Discharge conditions for efficient and rapid decomposition of perfluorooctane sulfonic acid (PFOS) in water using plasma Reviewed

    Nozomi Takeuchi

    International Journal of Plasma Environmental Science and Technology   14 ( 2 )   e02006   2020

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    DOI： 10.34343/ijpest.2020.14.e02006

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  • Plasma candle: A new type of scaled-up plasma jet device Reviewed

    Nozomi Takeuchi

    International Journal of Plasma Environmental Science and Technology   14 ( 1 )   e01004   2020

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    DOI： 10.34343/ijpest.2020.14.e01004

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  • Effect of ozone generation on decomposition of acetic acid by plasma in underwater bubbles Reviewed

    Taichi Watanabe, Shungo Zen, Nozomi Takeuchi, Hyun-Ha Kim

    International Journal of Plasma Environmental Science and Technology   14 ( 2 )   e02001 - 9   2020

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    DOI： 10.34343/ijpest.2020.14.e02001

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  • Effect of hydrophilic/hydrophobic properties of carbon materials on plasma-sulfonation process and their catalytic activities in cellulose conversion Reviewed

    Oi Lun Li, Lusha Qin, Nozomi Takeuchi, Kwangho Kim, Takahiro Ishizaki

    Catalysis Today   337   155 - 161   2019.10

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    DOI： 10.1016/j.cattod.2019.04.025

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  • Influence of Arc Discharge on Contact Erosion and Contact Resistance in a Hybrid DC Switch Reviewed

    Chomrong Ou, Ryo Nakayama, Shungo Zen, Nozomi Takeuchi, Koichi Yasuoka

    Electrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts   2018-October   184 - 188   2019.1

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    DOI： 10.1109/HOLM.2018.8611744

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  • Study on Cu-W Clad Contact Materials with Arc-less Current Commutation in a Hybrid DC Switch

    Mo Chen, Yuta Yamada, Shungo Zen, Nozomi Takeuchi, Koichi Yasuoka

    2018 IEEE Holm Conference on Electrical Contacts   2018.10

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    DOI： 10.1109/holm.2018.8611674

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  • Generation mechanism of hydrogen peroxide in dc plasma with a liquid electrode Reviewed

    Nozomi Takeuchi, Naoto Ishibashi

    Plasma Sources Science and Technology   27 ( 4 )   045010   2018.4

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    DOI： 10.1088/1361-6595/aabd17

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  • Arcless Commutation of a Hybrid DC Breaker by Contact Voltage of Molten Metal Bridge Reviewed

    Koichi Yasuoka, Yoshiki Tsuboi, Tatsuya Hayakawa, Nozomi Takeuchi

    IEEE Transactions on Components, Packaging and Manufacturing Technology   8 ( 3 )   350 - 355   2018.3

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    DOI： 10.1109/TCPMT.2017.2765685

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  • Hydrophilization of graphite using plasma above/in a solution Reviewed

    Shuhei Hoshino, Kazuma Kawahara, Nozomi Takeuchi

    Japanese Journal of Applied Physics   57 ( 1 )   0102B1   2018.1

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    DOI： 10.7567/JJAP.57.0102B1

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  • Influence of Arc Discharge on Contact Erosion and Contact Resistance in a Hybrid DC Switch

    Chomrong Ou, Ryo Nakayama, Shungo Zen, Nozomi Takeuchi, Koichi Yasuoka

    Proceedings of 2018 29TH International Conference on Electrical Contacts and 64TH IEEE HOLM Conference on Electrical Contancts   184 - 188   2018

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  • Effective utilization of ozone in plasma-based advanced oxidation process Reviewed

    Nozomi Takeuchi, Naoto Ishibashi, Tsuyoshi Sugiyama, Hyun-Ha Kim

    Plasma Sources Science and Technology   27 ( 5 )   055013   2018

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    DOI： 10.1088/1361-6595/aac0ea

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  • Optical emission spectra from tall structure lighting and evaluation of NOx generations

    Jen Shih Chang, T. Sakuta, N. Takeuchi, K. Yasuoka, W. Janischewskyj

    2010 30th International Conference on Lightning Protection, ICLP 2010   2017.2

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    DOI： 10.1109/ICLP.2010.7845758

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  • Study of optimal parameters of the H<inf>2</inf>O<inf>2</inf>/O<inf>3</inf>method for the decomposition of acetic acid Reviewed

    Nozomi Takeuchi, Hideaki Mizoguchi

    Chemical Engineering Journal   313   309 - 316   2017

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    DOI： 10.1016/j.cej.2016.12.040

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  • A hybrid DC circuit breaker with vacuum contact and SiC-MOSFET for arcless commutation Reviewed

    Koichi Yasuoka, Tsuboi Yoshiki, Tatsuya Hayakawa, Tamanosuke Oide, Nozomi Takeuchi

    Electrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts   2016-December   45 - 48   2016.12

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    DOI： 10.1109/HOLM.2016.7780005

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  • Quantitative Estimation of OH Radicals Reacting in Liquid Using a Chemical Probe for Plasma in Contact with Liquid Reviewed

    D. Shiraki, N. Ishibashi, N. Takeuchi

    IEEE Transactions on Plasma Science   44 ( 12 )   3158 - 3163   2016.12

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    DOI： 10.1109/TPS.2016.2603157

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  • The Effect of Liquid-Phase Stirring in the Decomposition Processes of Organic Compounds through a Gas-Liquid Interface

    溝口秀彰, 竹内希

    静電気学会誌   40 ( 2 )   96 - 101   2016.3

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  • Mineralization of highly conductive and contaminated produced water using an oxidation system combining diaphragm discharge and ozone

    佐伯亮, 立花孝介, 神谷佑, 溝口秀彰, 竹内希, 安岡康一

    静電気学会誌   40 ( 2 )   90 - 95   2016.3

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  • ACCURATE QUANTIFICATION OF HYDROXYL RADICALS PRODUCED BY PLASMA USING DISODIUM TEREPHTHALATE SOLUTION Reviewed

    Daichi Shiraki, Nozomi Takeuchi

    2016 43RD IEEE INTERNATIONAL CONFERENCE ON PLASMA SCIENCE (ICOPS)   2016

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  • ARC-LESS COMMUTATION IN HYBRID DC CIRCUIT BREAKER

    Yasuoka, Koichi, Ikeda, Kei, Tsuboi, Yoshiki, Hayakawa, Tatsuya, Takeuchi, Nozomi, IEEE

    2016 43rd IEEE International Conference on Plasma Science (Icops)   2016

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  • CHARACTERISTICS OF REACTIVE SPECIES PRODUCED BY AC PLASMA GENERATED IN GAS BUBBLES Reviewed

    Tsuyoshi Sugiyama, Nozomi Takeuchi

    2016 43RD IEEE INTERNATIONAL CONFERENCE ON PLASMA SCIENCE (ICOPS)   2016

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  • Comparison of one- and zero-dimensional reaction models of liquid-phase radicals for plasma generated on gas-liquid interface Reviewed

    Nozomi Takeuchi

    Electronics and Communications in Japan   98 ( 12 )   55 - 62   2015.12

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    DOI： 10.1002/ecj.11765

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  • Investigation of the loss mechanisms of hydroxyl radicals in the decomposition of organic compounds using plasma generated over water Reviewed

    Nozomi Takeuchi, Mizuki Ando, Koichi Yasuoka

    Japanese Journal of Applied Physics   54 ( 11 )   116201   2015.11

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    DOI： 10.7567/JJAP.54.116201

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  • Decomposition of perfluoro compounds using plasmas within bubbles in water and simulation of decomposition system by circuit modeling of plasma Reviewed

    Hayato Obo, Nozomi Takeuchi, Koichi Yasuoka

    IEEJ Transactions on Fundamentals and Materials   135 ( 5 )   310 - 317   2015.5

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    DOI： 10.1541/ieejfms.135.310

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  • Decomposition of Perfluorooctanesulfonate (PFOS) by Multiple Alternating Argon Plasmas in Bubbles with Gas Circulation Reviewed

    H. Obo, N. Takeuchi, Yasuoka

    International Journal of Plasma Environmental Science & Technology   9 ( 1 )   62 - 68   2015.4

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  • Decomposition of Perfluorinated Compounds in Water by DC Plasma within Oxygen Bubbles Reviewed

    Ryuichi Hayashi, Hayato Obo, Nozomi Takeuchi, Koichi Yasuoka

    ELECTRICAL ENGINEERING IN JAPAN   190 ( 3 )   9 - 16   2015.2

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    DOI： 10.1002/eej.22499

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  • Mass transfer enhancement of reactive species by gas- and liquid-phase flow induced by corona discharge generated above water Reviewed

    N. Takeuchi, K. Takubo

    International Journal of Plasma Environmental Science and Technology   9 ( 1 )   2 - 6   2015.1

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  • Relationship Between Reaction Rate of Perfluorocarboxylic Acid Decomposition at a Plasma-Liquid Interface and Adsorbed Amount Reviewed

    Yuriko Matsuya, Nozomi Takeuchi, Koichi Yasuoka

    ELECTRICAL ENGINEERING IN JAPAN   188 ( 2 )   1 - 8   2014.7

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    DOI： 10.1002/eej.22526

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  • Reaction Process of Perfluorooctanesulfonic Acid (PFOS) Decomposed by DC Plasma Generated in Argon Gas Bubbles Reviewed

    Kosuke Tachibana, Nozomi Takeuchi, Koichi Yasuoka

    IEEE TRANSACTIONS ON PLASMA SCIENCE   42 ( 3 )   786 - 793   2014.3

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    DOI： 10.1109/TPS.2014.2304520

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  • Decomposition of Perfluoro Compounds in Water using Plasma and Persulfate Treatments

    Kitagawa Yuzuru, Kosugi Akihiro, Takeuchi Nozomi, Yasuoka Koichi

    IEEJ Transactions on Fundamentals and Materials   134 ( 11 )   591 - 597   2014

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    Efficient decomposition of perfluoro compounds in water was studied by combining plasma and persulfate treatments. Although plasma generated within bubbles in water could decompose perfluorooctane sulfonic acid (PFOS: C8F17SO3H) rapidly and efficiently, the plasma treatment was not suitable for the treatment of the by-products with short carbon chains. Thus, a persulfate-added hot-water treatment was conducted after decomposing PFOS by 99% with the plasma treatment. The combination of the plasma and persulfate treatments for 200 mL PFOS solution at an initial concentration of 100 mmol/L decreased the treatment time from 430 min to 240 min, and increased the energy efficiency from 8.3 mg/kWh to 13.5 mg/kWh.

    DOI： 10.1541/ieejfms.134.591

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  • Comparison of One- and Zero-Dimensional Reaction Models of Liquid-Phase Radicals for Plasma Generated on Gas-Liquid Interface

    Takeuchi Nozomi

    IEEJ Transactions on Fundamentals and Materials   134 ( 5 )   315 - 320   2014

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    One- and zero-dimensional numerical models of plasma generated over a solution were established. Gas- and liquid-phase reactions and mass transfer through a gas-liquid interface for OH radical, hydrogen peroxide, and HO2 radical were considered, and the decomposition of acetic acid in water was evaluated. In one-dimensional model with a small diffusion coefficient (10-9m2/s) in liquid phase, the diffusion rate was the rate-limiting factor of the decomposition of acetic acid. With such a small diffusion coefficient, the concentrations of OH radical and acetic acid in the zero-dimensional model showed large differences from those in one-dimensional model. When the time scale of diffusion in liquid phase was shorter than that of decomposition reaction between OH radical and acetic acid, reasonable results were obtained in the zero-dimensional model.

    DOI： 10.1541/ieejfms.134.315

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  • Plasma-liquid interfacial reaction in decomposition of perfluoro surfactants Reviewed

    Takeuchi, N., Kitagawa, Y., Kosugi, A., Tachibana, K., Obo, H., Yasuoka, K.

    Journal of Physics D-Applied Physics   47 ( 4 )   045203   2014

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    DOI： 10.1088/0022-3727/47/4/045203

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  • Decomposition of Perfluorooctanoic Acid in Water Using Multiple Plasma Generation Reviewed

    Hayato Obo, Nozomi Takeuchi, Koichi Yasuoka

    IEEE TRANSACTIONS ON PLASMA SCIENCE   41 ( 12 )   3634 - 3639   2013.12

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    DOI： 10.1109/TPS.2013.2286995

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  • Relationship between Reaction Rate of Perfluorocarboxylic Acids Decomposition at the Interface of Plasma-Liquid and Adsorbed Amount

    MATSUYA Yuriko, TAKEUCHI Nozomi, YASUOKA Koichi

    IEEJ Transactions on Fundamentals and Materials   132 ( 11 )   1027 - 1032   2012.11

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    Perfluorooctanoic acid (PFOA: C7F15COOH) in water has been decomposed effectively by plasmas generated at a gas-liquid interface. During the decomposition of PFOA, perfluorocarboxylic acids (PFCAs: CnF2n+1COOH) with shorter carbon chains (n = 1-6) are generated as by-products. Since these PFCAs are surfactant, they adsorb to the gas-liquid interface and show high surface concentration. This study investigated the relationship between the adsorbed amount of the PFCAs and the rate of decomposition by a dc plasma. The adsorbed amount of the PFCAs at the gas-liquid interface increased as the length of the carbon chains increased, resulting in a higher rate of decomposition. However, the reaction rate reached saturation with a certain adsorption amount depending on the discharge current.

    DOI： 10.1541/ieejfms.132.1027

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  • Decomposition of Perfluorinated Compounds in Water by DC Plasma within Oxygen Bubbles

    HAYASHI Ryuichi, OBO Hayato, TAKEUCHI Nozomi, YASUOKA Koichi

    IEEJ Transactions on Fundamentals and Materials   132 ( 9 )   767 - 772   2012.9

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    Complete decomposition of perfluorooctanoic acid (PFOA) at a concentration of 41.4mg/L and perfluorooctane sulfonate (PFOS) at a concentration of 60mg/L in water was successfully demonstrated by DC plasma within oxygen bubbles. PFOA and PFOS were decomposed completely after 3-hour operation and 8-hour operation, respectively. The decomposition efficiency was evaluated by measuring the amounts of fluorine ions which were detached from PFOA or PFOS in the solution. From the measurement of LC/MS, the main by-products generated during the plasma treatment turned out to be perfluorocarboxylic acids. For the practical application, 2-parallel operation of DC plasma was also demonstrated as a basic technology for a large capacity reactor. The decomposition efficiency of 2-parallel operation was at the same level as that of single operation.

    DOI： 10.1541/ieejfms.132.767

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  • Recovery of Fluoride Ions Using Electrodialysis From the Plasma-Treated Solution of Perfluoro Compounds Reviewed

    Nozomi Takeuchi, Yusuke Saito, Hayato Obo, Akihiro Kosugi, Koichi Yasuoka

    IEEE TRANSACTIONS ON PLASMA SCIENCE   40 ( 9 )   2185 - 2190   2012.9

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    DOI： 10.1109/TPS.2012.2205712

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  • The Quantitative Analysis of Active Species Generated by Direct Current Plasma within Oxygen Bubbles

    ISHII Yoko, ANDO Mizuki, TAKEUCHI Nozomi, IKEDA Kei, YASUOKA Koichi

    IEEJ Transactions on Fundamentals and Materials   132 ( 6 )   428 - 434   2012.6

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    In this research, concentrations of hydrogen peroxide and dissolved ozone generated by direct current plasma within oxygen bubbles in water were measured. The current magnitude and water conductivity were changed from 1 to 7mA, and from 1 to 100 &mu;S/cm, respectively. The highest efficiency of hydrogen peroxide generation was 0.64g/kWh at 7mA with 100&mu;S/cm solution. The concentration of dissolved ozone decreased with increasing the discharge current, and was almost zero when the current was higher than 5mA. Non-dimensional simulation revealed that the water vapor concentration in bubbles strongly affects the generation of active species. With a large current, the amount of water vaporized into the bubbles enlarged due to a large heat flux from plasma.

    DOI： 10.1541/ieejfms.132.428

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  • Active Species Generated by a Pulsed Arc Electrohydraulic Discharge Plasma Channel in Contaminated Water Treatments Reviewed

    O. L. Li, N. Takeuchi, Z. He, Y. Guo, K. Yasuoka, J. S. Chang, N. Saito

    PLASMA CHEMISTRY AND PLASMA PROCESSING   32 ( 2 )   343 - 358   2012.4

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    DOI： 10.1007/s11090-011-9346-8

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  • Modelling chemical reactions in dc plasma inside oxygen bubbles in water Reviewed

    N. Takeuchi, Y. Ishii, K. Yasuoka

    PLASMA SOURCES SCIENCE & TECHNOLOGY   21 ( 1 )   015006   2012.2

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    DOI： 10.1088/0963-0252/21/1/015006

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  • Adsorption and Efficient Decomposition of Perfluoro Compounds at Plasma-Water Interface Reviewed

    Nozomi Takeuchi, Ryohei Oishi, Yuzuru Kitagawa, Koichi Yasuoka

    IEEE TRANSACTIONS ON PLASMA SCIENCE   39 ( 12 )   3358 - 3363   2011.12

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    DOI： 10.1109/TPS.2011.2171374

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  • Wire-rod Type Electrohydrodynamic Gas Pumps With and Without Insulation Cover over Corona Wire Reviewed

    Nozomi Takeuchi, Koichi Yasuoka, Jen-Shih Chang

    IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION   18 ( 3 )   801 - 808   2011.6

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    DOI： 10.1109/TDEI.2011.5931068

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  • Experimental and theoretical study of acetic-acid decomposition by a pulsed dielectric-barrier plasma in a gas-liquid two-phase flow Reviewed

    Y. Matsui, N. Takeuchi, K. Sasaki, R. Hayashi, K. Yasuoka

    PLASMA SOURCES SCIENCE & TECHNOLOGY   20 ( 3 )   034015   2011.6

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    DOI： 10.1088/0963-0252/20/3/034015

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  • Surface charge measurement in surface dielectric barrier discharge by laser polarimetry Reviewed

    N. Takeuchi, T. Hamasaki, K. Yasuoka, T. Sakurai

    JOURNAL OF ELECTROSTATICS   69 ( 2 )   87 - 91   2011.4

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    DOI： 10.1016/j.elstat.2011.01.001

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  • Electrohydrodynamic Flow Induced by Surface Dielectric Barrier Discharge in Narrow Channels Reviewed

    Nozomi Takeuchi, Koichi Yasuoka

    IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION   18 ( 2 )   631 - 639   2011.4

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    DOI： 10.1109/TDEI.2011.5739470

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  • Effect of Discharge Electrode Parameters on the Flow Velocity Profile of the Wire-rod Type Electrohydrodynamic Gas Pump Exit Reviewed

    Nozomi Takeuchi, Koichi Yasuoka, Jen-Shih Chang

    IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION   16 ( 3 )   615 - 621   2009.6

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    DOI： 10.1109/TDEI.2009.5128496

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  • Effect of Extension Length in a Surface Barrier Discharge on the Driving Force of Electrohydrodynamic Gas Flow Reviewed

    Nozomi Takeuchi, Koichi Yasuoka

    IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION   16 ( 2 )   364 - 371   2009.4

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    DOI： 10.1109/TDEI.2009.4815165

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  • One-dimensional Analysis of a Wire-Rod Type Electrohydrodynamic Gas Pump

    N. Takeuchi, K. Yasuoka, J. S. Chang

    CEIDP: 2009 ANNUAL REPORT CONFERENCE ON ELECTRICAL INSULATION AND DIELECTRIC PHENOMENA   502 - +   2009

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    DOI： 10.1109/CEIDP.2009.5377755

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  • Inducing mechanism of electrohydrodynamic flow by surface barrier discharge Reviewed

    Nozomi Takeuchi, Koichi Yasuoka, Shozo Ishii

    IEEE TRANSACTIONS ON PLASMA SCIENCE   35 ( 6 )   1704 - 1709   2007.12

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    DOI： 10.1109/TPS.2007.908909

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  • Effect of discharge parameters on electrohydrodynamic flow with asymmetric discharge electrodes Reviewed

    Nozomi Takeuchi, Koichi Yasuoka, Shozo Ishii

    IEEJ Transactions on Fundamentals and Materials   127 ( 3 )   133 - 138   2007

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    DOI： 10.1541/ieejfms.127.133

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  • Surface modification of thin rods by theta-pinching metallic plasmas Reviewed

    Nozomi Takeuchi, Koichi Yasuoka, Shozo Ishii

    IEEE TRANSACTIONS ON PLASMA SCIENCE   34 ( 4 )   1112 - 1115   2006.8

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    DOI： 10.1109/TPS.2006.876484

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  • PFASの規制動向と対応技術

    竹内希,ほか（ Role： Joint author第４章：PFASの分解，無害化と再資源化，第４節：大気圧プラズマによる有機フッ素化合物の分解）

    技術情報協会  2024.6  （ ISBN:9784867980279 ）

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    Total pages：516p   Language：Japanese  

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  • プラズマ産業革新技術

    竹内希（ Role： Joint author第２章 材料分野への応用「第１０節 高周波液中プラズマの生成とその材料応用」）

    シーエムシー出版  2023.4  （ ISBN:9784781317335 ）

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    Total pages：v, 317p   Language：Japanese  

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  • 電気学会技術報告第1546号「プラズマ材料表面処理技術の最新動向」

    プラズマ材料表面処理技術の最新動向調査専門委員会（ Role： Joint author）

    2023 

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  • 基礎からの高電圧工学

    高木, 浩一, 向川, 政治, 竹内, 希, 高橋, 克幸, 門脇, 一則

    森北出版  2022.10  （ ISBN:9784627787513 ）

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    Total pages：iv,199p   Language：Japanese  

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  • 電気学会技術報告第1534号「電磁界応答流体によるエネルギー・環境技術の新展開」

    電磁界応答流体によるエネルギー, 環境技術の新展開に関する調査専門委員会（ Role： Joint author）

    2022 

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  • 電気学会技術報告第1488号「放電・プラズマ気相シミュレーション技法」

    放電・プラズマ気相シミュレーション技法調査専門委員会（ Role： Joint author）

    2020 

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  • プラズマ産業応用技術 : 表面処理から環境,医療,バイオ,農業用途まで = Plasma technologies for industry applications : applications extended from surface treatment to environmental, medical, biological, and agricultural uses

    竹内希, 安岡康一（ Role： Joint author第３章 環境浄化への応用「第６節 気泡プラズマを用いた水処理」）

    シーエムシー出版  2017  （ ISBN:9784781312569 ）

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    Language：Japanese  

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  • 電気学会技術報告第1339号「液界面プラズマの実験・計算モデル」

    液界面プラズマの実験, 計算モデル標準化調査専門委員会（ Role： Joint author）

    2015 

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  • 大気圧プラズマ反応工学ハンドブック : 反応過程の基礎とシミュレーションの実際

    神原 信志, 大久保 雅章, 佐藤 岳彦, 野崎 智洋

    エヌ・ティー・エス  2013  （ ISBN:9784864690683 ）

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  • 電気学会技術報告第1224号「液中・液界面プラズマの反応過程と先端応用」

    プラズマによる水処理, 水高機能化と水界面における反応過程調査専門委員会（ Role： Joint author）

    2011 

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MISC

  • Developments in low-temperature plasma applications in Asia Invited Reviewed International coauthorship International journal

    Pankaj Attri, Kenji Ishikawa, Nozomi Takeuchi, Tomohiro Nozaki, Rajdeep Singh Rawat, Zhitong Chen, Bo Ouyang, Takamasa Okumura, Danni Fu, Katsuyuki Takahashi, Dae-Yeong Kim, Xiaozhong Chen, Kunihiro Kamataki, Koichi Takaki, Eun Ha Choi, Masaru Hori, Kazunori Koga, Masaharu Shiratani

    Reviews of Modern Plasma Physics   9 ( 1 )   6   2025.2

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    Language：English   Publisher：Springer Science and Business Media LLC  

    DOI： 10.1007/s41614-025-00184-9

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    Other Link： https://link.springer.com/article/10.1007/s41614-025-00184-9/fulltext.html

  • 気液界面プラズマプロセスを用いたグリーンで効率的な炭素スルホン化とそのバイオマス加水分解触媒への応用 Invited International coauthorship

    竹内希, リオイルン

    硫酸と工業   77 ( 8 )   8 - 12   2024.8

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    Authorship：Lead author   Language：Japanese  

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  • [小特集] 水中難分解性物質の低環境負荷処理に挑戦する放電プラズマ技術, 7. おわりに Invited Reviewed

    竹内希

    Journal of Plasma and Fusion Research   100 ( 3 )   158 - 158   2024

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    Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

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  • 放電プラズマによる水処理研究委員会の活動記録 Invited

    金澤誠司, 竹内希

    静電気学会誌   48 ( 2 )   62 - 63   2024

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    Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

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  • [小特集] 水中難分解性物質の低環境負荷処理に挑戦する放電プラズマ技術, 2. 水中放電プラズマ生成技術の発展と難分解性有機物処理 Invited Reviewed

    竹内希

    Journal of Plasma and Fusion Research   100 ( 3 )   123 - 127   2024

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    Authorship：Lead author,　Corresponding author   Language：Japanese  

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  • 化学物質のエコな一生をプラズマで照らす

    竹内希

    someone   65   10 - 11   2023

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    Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)  

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  • 静電気・高電圧・放電・プラズマ若手研究委員会と本特集 Invited

    Nozomi Takeuchi

    静電気学会誌   45 ( 4 )   90 - 91   2021

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  • プラズマによる水中有機物の分解と水中殺菌

    Nozomi Takeuchi

    静電気学会誌   44 ( 6 )   230 - 238   2020.11

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  • Review of plasma-based water treatment technologies for the decomposition of persistent organic compounds Invited Reviewed

    Nozomi Takeuchi, Koichi Yasuoka

    Japanese Journal of Applied Physics   60 ( SA )   SA0801 - SA0801   2020.10

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)   Publisher：IOP Publishing  

    Abstract

    The establishment of economical and eco-friendly technologies for water treatment is a crucial issue for the realization of a sustainable society. Plasma-based treatments are promising methods for the decomposition of persistent organic compounds. This progress report summarizes recent improvements to plasma-based water treatment technologies by focusing on two types of contaminated solutions: solutions containing high concentrations of acetic acid and solutions containing surfactants, such as perfluorooctane sulfonic acid. Decomposition processes were analyzed based on chemical and physical characteristics, such as chemical reactions, the transportation of reactive species, and characteristics of target compounds. When treating solutions containing acetic acid, the optimization of bulk reactions involving ozone, which regenerates OH radicals from hydrogen peroxide, is a key factor for achieving high decomposition rates and energy efficiency. In contrast, the treatment of surfactants involves interfacial reactions at the plasma–liquid interface, where the accumulation of surfactants is a major concern.

    DOI： 10.35848/1347-4065/abb75d

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  • 液中活性種の計測と化学反応シミュレーション Invited

    Nozomi Takeuchi

    静電気学会誌   44 ( 5 )   207 - 215   2020.9

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  • Conditions for stable generation of solution plasma in ethanol/water mixed solution

    2020 ( 62 )   7 - 12   2020.3

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  • Improve Understanding of Basic Engineering Lectures with e-learning - Department of Electrical and Electronics Engineering -

    Akira CHIBA, Koichi YASUOKA, Shigeki NAKAGAWA, Hiroshi AKATSUKA, Atsuhiro NISHIKATA, Makoto HAGIWARA, Masahiro WATANABE, Nozomi TAKEUCHI, Shungo ZEN, Ei TOKIOKA

    Journal of JSEE   66 ( 5 )   5_44 - 5_49   2018.10

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    A cloud service, Handbook, has been introduced in the lectures for the second and third grade students in the Electrical and Electronics Engineering in the Tokyo Institute of Technology. The cloud service can be accessed by students’ personal ICT devices, such as smart phones (android or iPhone), tablets, and notebook computers. Several faculty members have improved their lectures taking the advantages of the cloud service and the ICT devices.

    DOI： 10.4307/jsee.66.5_44

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  • 放電プラズマによる水処理研究の現状と展望

    金澤誠司, 竹内希

    クリーンテクノロジー   28 ( 3 )   10‐15   2018.3

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  • eラーニングを活用した工学系専門科目の理解度向上 -東京工業大学電気電子系- Reviewed

    千葉明, 安岡康一, 中川茂樹, 赤塚洋, 西方敦博, 萩原誠, 渡辺正裕, 竹内希, 全俊豪, 時岡えい

    工学教育   66 ( 5 )   44 - 49   2018

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  • 研究グループ紹介：産業技術総合研究所 環境管理研究部門 反応場設計研究グループ

    竹内 希

    電気学会論文誌Ａ（基礎・材料・共通部門誌）   138 ( 5 )   NL5_3 - NL5_3   2018

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    Language：Japanese   Publisher：一般社団法人 電気学会  

    DOI： 10.1541/ieejfms.138.NL5_3

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  • Recent progress in plasma technology Reviewed

    Tatsuru Shirafuji, Nozomi Takeuchi, Ryuta Ichiki, Takuya Kuwahara

    IEEJ Transactions on Fundamentals and Materials   138 ( 1 )   8 - 9   2018

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    Language：Japanese   Publisher：The Institute of Electrical Engineers of Japan  

    DOI： 10.1541/ieejfms.138.8

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  • Mineralization of Persistent Organics and Hydrophilization of Carbon Materials Using Plasma at Water Boundary

    YASUOKA Koichi, TAKEUCHI Nozomi

    Vacuum and Surface Science   61 ( 3 )   150 - 156   2018

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    Language：Japanese   Publisher：The Surface Science Society of Japan / The Vacuum Society of Japan  

    <p>A plasma generated at the water boundary can be a useful tool for water purification or hydrophilization of multilayer graphene powder. A combined ozone/plasma system was proposed for mineralizing a high density persistent substances in water. A multiple pin-hole plasmas increased the hydrogen-peroxide supply rapidly for advanced oxidation processes. The mineralization speed was increased to 0.4 gTOC/L/h at the energy efficiency of 0.5 gTOC/kWh. Hydrophilization of multilayer graphene powder suspended in water was conducted using Ar plasma generated above the solution. Hydroxyl group were modified to the multilayer graphene and the dispersibility was improved with very short treatment time of several minutes.</p>

    DOI： 10.1380/vss.61.150

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  • Reduction of graphene oxide using solution plasma

    2017 ( 48 )   27 - 30   2017.8

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  • Decomposition of Acetic Acid Using Multiple Plasmas Generated within Bubbles

    2017 ( 18 )   43 - 47   2017.5

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  • Recent activities of Technical Committee on Plasma Science and Technology

    Yasunori Tanaka, Nozomi Takeuchi, Ryuta Ichiki, Takuya Kuwahara

    IEEJ Transactions on Fundamentals and Materials   137 ( 1 )   8 - 9   2017

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    Language：Japanese   Publisher：The Institute of Electrical Engineers of Japan  

    DOI： 10.1541/ieejfms.137.8

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  • Plasma applications for the environment and power systems:Focusing on the relationship between plasmas and liquids

    TAKEUCHI Nozomi, YASUOKA Koichi

    Oyo Buturi   86 ( 6 )   483 - 487   2017

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    Language：Japanese   Publisher：The Japan Society of Applied Physics  

    <p>Plasmas are used for many environmental applications. In water treatments using plasma with a water electrode, organic compounds in the water are decomposed by reactive species generated from evaporated water. Plasma is also used in applications for power systems such as for a circuit breaker. In a hybrid DC circuit breaker, arc discharge plasma generated between electrical contacts initiates the current interruption process. The plasma is generated after the evaporation of the contacts, which is a temporally-reversed process observed in plasma with a water electrode. Water treatment technologies using plasma and the behavior of a hybrid DC circuit breaker are introduced, focusing on the relationship between plasmas and liquids.</p>

    DOI： 10.11470/oubutsu.86.6_483

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  • Decomposition of Acetic Acid using Selective Generation of Active Species by Plasma within Gas Bubbles in Water

    2016 ( 89 )   77 - 80   2016.10

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  • Decomposition of PFOS using diaphragm discharge

    2016 ( 89 )   69 - 72   2016.10

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  • アルゴン酸素混合水面上プラズマを用いたグラファイトの親水化 (プラズマ パルスパワー 放電合同研究会・放電,プラズマ,パルスパワー)

    星野 修平, 竹内 希

    電気学会研究会資料. PST   2016 ( 89 )   99 - 102   2016.10

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  • Interaction between Plasmas and Liquids

    白藤立, 竹内希

    プラズマ・核融合学会誌   92 ( 9 )   693 - 699   2016.9

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  • Comparison of hydrophilization of graphite by advanced oxidation process and plasma in water

    2016 ( 53 )   7 - 10   2016.8

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  • Simulation of Ionic Wind Induced by Corona Discharge Using COMSOL Multiphysics

    竹内希

    静電気学会誌   40 ( 4 )   168 - 171   2016.7

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  • Recent activities of technical committee on plasma science and technology

    Yasunori Tanaka, Masanori Shinohara, Nozomi Takeuchi, Ryuta Ichiki, Takuya Kuwahara

    IEEJ Transactions on Fundamentals and Materials   136 ( 1 )   16 - 17   2016.1

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    Language：Japanese   Publishing type：Book review, literature introduction, etc.   Publisher：The Institute of Electrical Engineers of Japan  

    DOI： 10.1541/ieejfms.136.16

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  • Reignition Characteristics in Hybrid Circuit Breaker Using Vacuum Contactor

    2015 ( 95 )   1 - 6   2015.11

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  • Interrupting Experiment of Hybrid DC Circuit Breaker and Its Circuit Simulation

    2015 ( 9 )   85 - 90   2015.7

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  • Plasmas in Contact with Liquid : "Plasma Electrochemistry"

    SHIRAFUJI Tatsuru, SARRO Nagahiro, TAKAI Osamu, TOCHIKUBO Fumiyoshi, YASUOKA Koichi, KANEKO Toshiro, ISHUIMA Tatsuo, TAKAHASHI Kenji, TAKEUCHI Nozomi, SHIRAI Naoki

    Hyomen Kagaku   34 ( 10 )   547 - 552   2013.10

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    Language：Japanese   Publisher：The Surface Science Society of Japan  

    This paper describes historical overview and recent activity on &ldquo;plasma electrochemistry&rdquo;, which involves materials processing with plasmas in contact with liquids. Nano-materials synthesis and organic-pollutant decomposition are the most active application areas. The most important part of the plasma electrochemistry is the plasma/liquid interface. The physicochemical processes near the plasma/liquid interface have been gradually clarified through experiments and numerical simulations. These are briefly described in this paper together with future issues for understanding effects of electric double layer and nano-scale steep density gradient.

    DOI： 10.1380/jsssj.34.547

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  • Lower-Dimensional Model of Mass Transfer for Plasmas Generated on Gas-Liquid Interface

    TAKEUCHI Nozomi, YASUOKA Koichi

    2013 ( 10 )   51 - 56   2013.3

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  • Decomposition of Organic Fluorine Compound with Plasma Treatment in combination with Persulfate Treatment

    KITAGAWA Yuzuru, TAKEUCHI Nozomi, YASUOKA Koichi

    2013 ( 10 )   73 - 78   2013.3

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  • Study on improvement of advanced oxidation technology of pulsed plasma within bubble in water

    SHIBATA Ryuichi, TAKEUCHI Nozomi, YASUOKA Koichi

    2013 ( 10 )   85 - 90   2013.3

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  • Plasmas in Contact with Liquid: &quot;Plasma Electrochemistry&quot;

    白藤立, 齋藤永広, 高井治, 杤久保文嘉, 安岡康一, 金子俊郎, 石島達夫, 高橋憲司, 竹内希, 白井直機

    表面科学   34 ( 10 )   547-552 (J-STAGE)   2013

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  • Decomposition of Acetic Acid by Argon Pulsed Plasma over Solution

    TAKEUCHI Nozomi, ANDO Mizuki, YASUOKA Koichi

    2012 ( 1 )   37 - 40   2012.5

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  • Phenomena on Plasma-Liquid Interface

    TAKEUCHI Nozomi

    IEEJ Transactions on Fundamentals and Materials   132 ( 1 )   5 - 8   2012.1

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    Language：Japanese   Publisher：The Institute of Electrical Engineers of Japan  

    Recent researches on plasma-liquid interface are introduced. One is about plasma-water interaction at the interface of pulsed dielectric-barrier plasma in gas-liquid two-phase flow for water treatment. Acetic acid in water is decomposed as a persistent material. Numerical calculation indicates that plasma-water interaction which is O-radical-induced generation of liquid-phase-OH radical occurs. The other reports highly-concentrated adsorption of a surfactant at plasma-water interface, and an interfacial reaction decomposing the surfactant. Perfluorooctane sulfonic acid is an extremely persistent surfactant, but can be decomposed by plasma attached to the solution. The decomposing reaction occurs at the plasma-water interface. Estimation of the amount of PFOS adsorbing to the plasma-water interface shows much higher mole fraction of PFOS than that in bulk water. Thus, the plasma can effectively react with PFOS at the water surface and exhibits high energy efficiency.

    DOI： 10.1541/ieejfms.132.5

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  • S055013 Modelling of Mass Transfer at Plasma-Water Interface

    TAKEUCHI Nozomi, ANDO Mizuki, YASUOKA Koichi

    The Proceedings of Mechanical Engineering Congress, Japan   2012 ( 0 )   _S055013 - 1-_S055013-2   2012

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    Language：Japanese   Publisher：The Japan Society of Mechanical Engineers  

    Plasmas generated at gas-liquid interface have been developed for water treatment. Reactive species, such as H202, 03, and OH radical, are mainly generated in the gas phase, and then transfer to the liquid phase. In this study, zero-dimensional numerical simulation of reactions in gas and liquid phases and the mass transfer through the gas-liquid interface was conducted for plasma generated inside oxygen bubbles. Comparison between the numerical and experimental results quantitatively revealed the reaction paths and phenomena at the plasma-liquid interface such as water vaporization due to the heat flux from the plasma to the water.

    DOI： 10.1299/jsmemecj.2012._S055013-1

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  • Evaluation of decomposing organic compound by plasma in bubbles

    SHIBATA Ryuichi, ANNMA Ryosuke, ANDO Mizuki, TAKEUCHI Nozomi, YASUOKA Koichi

    2011 ( 71 )   31 - 34   2011.12

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  • Comparison of the decomposing rate of perfluoro compounds in water using plasmas

    YASUOKA Koichi, TAKEUCHI Nozomi

    2011 ( 42 )   7 - 12   2011.10

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  • Numerical Simulation of Chemical Reaction in DC Oxygen Plasma inside Bubbles in Water

    TAKEUCHI Nozomi, ISHII Yoko, YASUOKA Koichi

    2011 ( 7 )   45 - 48   2011.5

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  • Study of Efficient Degradation of Perfluoro Compounds in Water Using DC Discharge Plasmas Generated within Bubbles

    KOSUGI Akihiro, KANNO Yu, TAKEUCHI Nozomi, YASUOKA Koichi

    2011 ( 7 )   49 - 54   2011.5

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  • S052014 Efficient Decomposition of Perfluoro Compounds Using Plasma Generated Inside Gas Bubbles Due to Adsorption

    TAKEUCHI Nozomi, OISHI Ryohei, KITAGAWA Yuzuru, YASUOKA Koichi

    The Proceedings of Mechanical Engineering Congress, Japan   2011 ( 0 )   _S052014 - 1-_S052014-5   2011

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    Language：Japanese   Publisher：The Japan Society of Mechanical Engineers  

    Perfluorooctane sulfonic acid (PFOS) is environmentally harmful and persistent substance. The decomposition of PFOS in water using plasma inside oxygen bubbles has been successfully conducted and the energy efficiency is relatively high compared to other methods such as photochemical process. The amount of PFOS adsorbing to the plasma?water interface showed much higher mole fraction of PFOS (6.0 X 10^-4) than that in bulk water (1.8 X 10^-6) at PFOS bulk concentration of 50 mg/L. Thus it is concluded that the plasma could effectively react with PFOS on the water surface and showed high energy efficiency.

    DOI： 10.1299/jsmemecj.2011._S052014-1

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  • Decomposition of perfluoro compounds in water and recovery of fluorine ions by electrodialysis

    SAITO Yusuke, TAKEUCHI Nozomi, YASUOKA Koichi

    2010 ( 108 )   51 - 56   2010.12

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  • Reaction Analysis and Large-Capacity Reactor for Degrading Perfluorooctane Sulfonate in Water Using Atmospheric Plasmas

    HAYASHI Ryuichi, TAKEUCHI Nozomi, YASUOKA Koichi

    2010 ( 108 )   21 - 26   2010.12

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  • Decomposition of perfluoro compounds in water and recovery of fluorine ions by electrodialysis

    SAITO Yusuke, TAKEUCHI Nozomi, YASUOKA Koichi

    2010 ( 72 )   1 - 6   2010.10

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  • Numerical Simulation of an Electrohydrodynamic Gas Pump Driven by Corona Discharges

    TAKEUCHI Nozomi, YASUOKA Koichi

    2010 ( 41 )   29 - 34   2010.8

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  • Electrohydrodynamic Effect Induced by Gas Discharge Without Electronegative Gases

    TAKEUCHI Nozomi, IMAI Yoshitaka, SAITOU Yusuke, YASUOKA Koichi

    2010 ( 1 )   15 - 18   2010.5

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  • Efficiency of a Wire-Rod Type Electrohydrodynamic Gas Pump Under Negative Corona Operation Reviewed

    Nozomi Takeuchi, Koichi Yasuoka

    IEEE TRANSACTIONS ON PLASMA SCIENCE   37 ( 6 )   1021 - 1026   2009.6

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  • Electrohydrodynamic Gas Flow Generation by a Surface Barrier Discharge inside a Narrow Channel

    TAKEUCHI Nozomi, YASUOKA Koichi

    2008 ( 98 )   23 - 28   2008.12

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  • Influence of Surface Charge on Electrohydrodynamic Flow driven by Dielectric-Barrier Discharge

    HAMASAKI Takashi, TAKEUCHI Nozomi, YASUOKA Koichi, SAKURAI Takeki

    2008 ( 76 )   11 - 16   2008.12

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  • Streamer Extension and Electrohydrodynamic Flow Generation with Single Barrier Surface Discharge

    TAKEUCHI Nozomi, YASUOKA Koichi

    2007 ( 80 )   83 - 88   2007.12

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  • Aerodynamic Noise Reduction by Plasma Actuators

    TAKEUCHI Nozomi, YASUOKA Koichi, ISHII Shozo

    2006 ( 35 )   29 - 33   2006.5

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  • Application of dielectric barrier discharge using macro-porous electrode to ultraviolet light source

    KUBOTA Satoshi, TAKEUCHI Nozomi, YASUOKA Koichi, ISHII Shozo, NAKAI Masumi, HASUO Shunji

    2005 ( 1 )   45 - 50   2005.1

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Presentations

  • Conditions for stable generation of solution plasma in ethanol/water mixed solution

    2020.3 

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  • Decomposition of organic matters using ultra-high-temperature plasma Invited

    N. Takeuchi

    2nd ASBFP  2025.6 

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  • 電気学会教育支援部会の活動:大学・高専の電気主任技術者認定科目を主対象とした寄付講義など Invited

    竹内希

    電気学会令和6年基礎・材料・共通部門大会  2025.9 

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  • プラズマを用いた水中有機フッ素化合物PFAS分解における濃縮の重要性 Invited

    竹内希

    化学工学会第56回秋季大会  2025.9 

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  • Plasma–ozone combination process for decomposition of persistent organic compounds with efficient generation of hydrogen peroxide Invited

    Nozomi Takeuchi, Taichi Watanabe, Ryusei Sakamoto, Anouphab Xonelatha, Tsutomu Hirakawa

    AAPPS-DPP2025  2025.9 

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  • Development of plasma-based water treatment technologies based on the analyses of reaction fields by numerical simulations Invited

    N. Takeuchi

    AAPPS-DPP2021  2021.9 

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  • Plasma-ozone combined advanced oxidation process for decomposition of persistent organic compounds Invited

    N. Takeuchi

    IWM-11  2022.6 

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  • 高周波液中プラズマの生成とその材料応用 Invited

    竹内希

    2022年度静電気学会東北・関西・九州支部合同研究会, 第482回生存圏シンポジウム  2022.10 

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  • オゾン/過酸化水素による促進酸化法のシミュレーションモデルの構築と改良 Invited

    竹内希

    日本オゾン協会第39回オゾン技術に関する講習会  2022.12 

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  • 液界面プラズマによる炭素材料スルホン化とセルロースのバイオ燃料転換触媒への応用 Invited

    竹内希, S. Deng, L. Qing, 高橋克幸, 立花孝介, 稗田純子, O.L. Li

    表面技術協会第147回講演大会  2023.3 

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  • Carbon sulfonation for synthesis of catalyst for cellulose conversion using plasmas in contact with dilute sulfuric acid Invited

    N. Takeuchi, S. Deng, L. Qin, K. Takahashi, K. Tachibana, J. Hieda, O.L. Li

    JVSS2023  2023.10 

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  • プラズマを用いた有機フッ素化合物PFAS分解技術の展望 Invited

    竹内希

    2023年度産総研エネルギー・環境シンポジウムシリーズ プラズマ技術が描く次世代産業変革と環境創生  2023.11 

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  • Adsorption and Efficient Decomposition of PFAS at Plasma-water Interface Invited

    N. Takeuchi, S. Qing, T. Namihira, D. Wang

    2023 EAPETEA-9  2023.11 

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  • プラズマによるPFOS，PFAS物質の高速分解技術とその可能性について Invited

    竹内希

    PFOA・PFOS等を含めた「PFAS」 (有機フッ素化合物)における規制動向，その企業対応【2024年版】  2024.6 

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  • Development and perspective of plasma-based water treatment technologies for the decomposition of persistent organic compounds Invited

    N. Takeuchi

    ISPC25  2023.5 

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  • Efficient carbon sulfonation using plasma in contact with dilute sulfuric acid Invited

    N. Takeuchi, S. Deng, K. Takahashi, K. Tachibana, J. Hieda, O.L. Li

    243rd ECS Meeting  2023.5 

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  • Improvement and scale-up of plasma-based water treatment process Invited

    N. Takeuchi

    ISNPEDADM 2023  2023.10 

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  • プラズマを用いたPFOSおよびその他PFASの高速分解技術 Invited

    竹内希

    PFAS(有機フッ素化合物)の分解･再資源化と効率的除去･処理技術  2024.8 

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  • IEEE NPSSからの放電・プラズマ・パルスパワー技術分野との交流拡大への期待 Invited

    竹内希

    電気学会令和6年基礎・材料・共通部門大会  2024.9 

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  • 気液界面プラズマを用いた水処理技術の開発 Invited

    竹内希

    第72回応用物理学会春季学術講演会  2025.3 

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  • 水中気泡内プラズマによる有機フッ素化合物の分解過程

    北川譲, 小杉明弘, 竹内希, 安岡康一

    電気学会全国大会講演論文集  2012.3 

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  • 水電極を有する大気圧直流放電の検討

    池田圭, 安藤瑞基, 竹内希, 安岡康一

    応用物理学関係連合講演会講演予稿集(CD-ROM)  2012.2 

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  • Decomposition of Organic Fluorine Compound with Plasma Treatment in combination with Persulfate Treatment

    KITAGAWA Yuzuru, TAKEUCHI Nozomi, YASUOKA Koichi

    電気学会研究会資料. PST, プラズマ研究会  2013.3 

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  • 高効率プラズマ水処理装置に向けたプラズマ‐気泡の同期制御

    大保勇人, 竹内希, 安岡康一

    日本混相流学会年会講演会講演論文集  2012.8 

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  • 同期生成気泡内パルスプラズマによる液中難分解物質処理

    安岡康一, 大保勇人, 竹内希

    日本混相流学会年会講演会講演論文集  2012.8 

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  • Study on improvement of advanced oxidation technology of pulsed plasma within bubble in water

    SHIBATA Ryuichi, TAKEUCHI Nozomi, YASUOKA Koichi

    電気学会研究会資料. PST, プラズマ研究会  2013.3 

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  • 気液界面プラズマから液相への物質輸送モデリング

    竹内希, 安藤瑞基, 安岡康一

    日本機械学会年次大会講演論文集(CD-ROM)  2012.9 

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  • Efficiency of hydrogen peroxide production using plasma with droplets

    石橋俊和, 竹内希

    電気学会プラズマ研究会資料  2014.10 

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  • 気液界面プラズマの反応シミュレーション

    竹内希

    電気学会全国大会講演論文集(CD-ROM)  2014.3 

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  • 水面上プラズマを用いた水処理における液相流れの重要性

    竹内希

    静電気学会講演論文集  2015 

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  • 水中気泡内プラズマの交流駆動における活性種生成特性

    竹内希, 溝口秀彰, 白木大地, 大保勇人

    電気・情報関係学会北海道支部連合大会講演論文集(CD-ROM)  2014.10 

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  • 気液界面アルゴンプラズマによる液中ラジカル生成シミュレーション

    竹内希, 安岡康一

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)  2013.8 

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  • Lower-Dimensional Model of Mass Transfer for Plasmas Generated on Gas-Liquid Interface

    TAKEUCHI Nozomi, YASUOKA Koichi

    電気学会研究会資料. PST, プラズマ研究会  2013.3 

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  • 機械接点とIGBTを用いたハイブリッド直流遮断器の遮断実験

    早川達也, 坪井祥紀, 竹内希, 安岡康一, 赤木泰文

    電気学会全国大会講演論文集(CD-ROM)  2015.3 

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  • 気液界面プラズマによる液相過酸化水素生成機構

    石橋直人, 竹内希

    応用物理学会春季学術講演会講演予稿集(CD-ROM)  2015.2 

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  • Generation Mechanism of Hydrogen Peroxide by DC Plasma on Water Surface

    石橋直人, 竹内希

    電気学会プラズマ研究会資料  2015.6 

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  • Generation of fine bubbles and enhancement of mass transfer of active species by electric field application

    井口寛, 竹内希

    電気学会プラズマ研究会資料  2015.6 

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  • ARC-LESS COMMUTATION IN HYBRID DC CIRCUIT BREAKER

    Yasuoka Koichi, Ikeda Kei, Tsuboi Yoshiki, Hayakawa Tatsuya, Takeuchi Nozomi, IEEE

    2016 43rd Ieee International Conference on Plasma Science (Icops)  2016 

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  • Accurate Quantification of Hydroxyl Radicals Produced by Plasma Using Disodium TerephthalateON

    2016 43rd IEEE International Conference on Plasma Science  2016 

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  • A Hybrid DC Circuit Breaker with Vacuum Contact and SiC-MOSFET for Arcless Commutation

    Yasuoka Koichi, Yoshiki Tsuboi, Hayakawa Tatsuya, Oide Tamanosuke, Takeuchi Nozomi, IEEE

    Proceedings of the Sixty-Second Ieee Holm Conference on Electrical Contacts  2016 

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  • Characteristics of Reactive Species Produced by AC Plasma Generated in Gas BUubbles

    2016 43rd IEEE International Conference on Plasma Science  2016 

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  • Interrupting Experiment of Hybrid DC Circuit Breaker and Its Circuit Simulation

    早川達也, 坪井祥紀, 竹内希, 安岡康一, 赤木泰文

    電気学会放電研究会資料  2015.7 

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  • Reignition Characteristics in Hybrid Circuit Breaker Using Vacuum Contactor

    坪井祥紀, 早川達也, 竹内希, 安岡康一, 赤木泰文

    電気学会放電研究会資料  2015.11 

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  • プラズマ・オゾン法による水中有機物分解反応モデル

    竹内希, 神谷佑, 溝口秀彰, 立花孝介, 佐伯亮, 安岡康一

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)  2015.8 

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  • 水面上プラズマを用いたグラファイトの親水化

    星野修平, 竹内希

    応用物理学会春季学術講演会講演予稿集(CD-ROM)  2016.3 

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  • ダイヤフラム放電による有機フッ素化合物PFOSの分解

    衛藤輝, 竹内希

    応用物理学会春季学術講演会講演予稿集(CD-ROM)  2016.3 

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  • ハイブリッド直流遮断器の開極アーク測定用ピエゾ素子駆動接点

    生出珠之助, 坪井祥紀, 早川達也, 竹内希, 安岡康一

    電気学会全国大会講演論文集(CD-ROM)  2016.3 

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  • Decomposition of PFOS using diaphragm discharge

    衛藤輝, 竹内希

    電気学会プラズマ研究会資料  2016.10 

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  • 過酸化水素・オゾン法を用いた酢酸分解過程の精査と反応シミュレーション

    溝口秀彰, 竹内希

    電気学会基礎・材料・共通部門大会講演論文集(CD-ROM)  2016.9 

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  • Decomposition of Acetic Acid using Selective Generation of Active Species by Plasma within Gas Bubbles in Water

    石橋直人, 杉山剛志, 竹内希

    電気学会プラズマ研究会資料  2016.10 

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  • Hydrophilization of Graphite Using Ar/O2 Mixed Gas Plasma over Solution

    星野修平, 竹内希

    電気学会プラズマ研究会資料  2016.10 

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  • Arcless Commutation and Prevention of Reignition in Hybrid DC Circuit Breaker Using Vacuum Contactor

    坪井祥紀, 早川達也, 生出珠之助, 竹内希, 安岡康一

    電気学会放電研究会資料  2016.3 

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  • 溶融ブリッジ電圧でアークレス転流を実現するハイブリッド直流遮断器

    早川達也, 坪井祥紀, 生出珠之助, 竹内希, 安岡康一

    電気学会全国大会講演論文集(CD-ROM)  2016.3 

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  • Comparison of hydrophilization of graphite by advanced oxidation process and plasma in water

    本多隆之, 星野修平, 竹内希

    電気学会プラズマ研究会資料  2016.8 

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  • Quantitative Estimation of OH Radicals in Liquid Using Disodium Terephthalate

    白木大地, 竹内希

    電気学会プラズマ研究会資料  2016.5 

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  • ソリューションプラズマを用いた水中・エタノール中でのグラファイトの親水化

    杉山剛志, 星野修平, 川原一真, 竹内希

    電気学会全国大会講演論文集(CD-ROM)  2017.3 

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  • 促進酸化処理を用いたグラファイトの親水化

    本多隆之, 竹内希

    応用物理学会春季学術講演会講演予稿集(CD-ROM)  2017.3 

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  • Decomposition of Acetic Acid by Argon Pulsed Plasma over Solution

    竹内希, 安藤瑞基, 安岡康一

    電気学会プラズマ研究会資料  2012.5 

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  • Physical and chemical aspects of water treatment technologies using plasma in contact with liquid Invited

    N. Takeuchi

    ISPlasma 2020  2020.3 

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  • Gas Discharge Induced ElectrohydrodynamicFlow in Narrow Channels

    2009 Electrostatics Joint Conference  2009 

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  • Control of reaction field in cavitation plasma for high-speed and eco-friendly synthesis of carbon catalysts

    N. Takeuchi, S. Yamazaki, S. Imaizumi, H. Takana

    ICFD 2020/AFI-2020  2020.10 

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  • Electrohydrodynamic Gas Flow Generation inside a Narrow Channel

    International Symposium on Electrohydrodynamics  2009 

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  • Unified analyses of gas- and liquid-phase reaction fields for reactive species generation by plasma in contact with liquid Invited

    N. Takeuchi

    30th Annual Meeting of MRS-J  2020.10 

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  • Gas Discharge Induced ElectrohydrodynamicFlow in Narrow Channels

    2009 Electrostatics Joint Conference  2009 

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  • Harmonized sulfur in disordered carbon structure for high-efficiency sodium-ion battery Invited

    N. Takeuchi

    HyMaP 2020 - Special  2020.11 

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  • 水中気泡内プラズマによる有機フッ素化合物の分解とフッ素イオンの回収

    第57回応用物理学関係連合講演会  2010 

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  • Cavitation flow to generate plasma in organic solvent for carbon particle synthesis

    N. Takeuchi, S. Yamazaki, S. Imaizumi, H. Takana

    ICFD 2020  2020.10 

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  • 微細流路内表面バリア放電による電気流体力学流の発生と流路壁面帯電の影響

    竹内希, 安岡康一

    応用物理学関係連合講演会講演予稿集  2009.3 

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  • アニリン溶液中におけるソリューションプラズマの放電特性評価

    今泉颯太, 竹内希

    第44回静電気学会全国大会  2020.9 

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  • 微細流路内沿面バリア放電による電気流体力学流と自然対流の発生

    第10回静電気学会春期講演会  2009 

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  • 大気圧誘電体バリア放電を用いた窒化マグネシウム合成条件による影響

    清水健人, 全俊豪, 竹内希

    令和2年電気学会全国大会  2020.3 

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  • Electrohydrodynamic Gas Flow Generation inside a Narrow Channel

    International Symposium on Electrohydrodynamics  2009 

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  • 矩形波交流電圧を用いたコロナ放電における周波数が空間電荷と電位に及ぼす影響

    内御堂駆, 高橋克幸, 高木浩一, 竹内希, 山口晋一

    第44回静電気学会全国大会  2020.9 

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  • Observation of the tall structure lightning by an advanced optical technique

    4th International Workshop on Electromagnetic Radiation from Lightning to Tall Structures  2009 

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  • 負極性パルスアルゴンプラズマにより 生成された硫酸・亜硫酸イオンラジカルの電子スピン共鳴法による測定

    立花孝介, 村田菜緒, 金澤誠司, 高橋克幸, 稗田純子, 竹内希, Oi Lun Li

    第44回静電気学会全国大会  2020.9 

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  • One-dimensional Analysis of a Wire-Rod TypeElectrohydrodynamic Gas Pump

    2009 IEEE Conference on Electrical Insulation and Dielectric Phenomena  2009 

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  • Recovery of Fluorine from Perfluoro-compounds in Water During Decomposing Processes by Plasmas

    International Workshop on Plasmas with Liquids  2010 

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  • Insight into H2O2 selectivity in the electrocatalytic oxygen reduction reaction on sulfur-doped disordered carbon synthesized by the plasma-in-liquid process

    H. Kim, N. Takeuchi

    HyMaP 2020 - Special  2020.11 

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  • 大気圧流動層プラズマを利用した常温下でのアンモニア合成手法の開発

    佐藤匠, 竹内希, 全俊豪

    誘電・絶縁材料/放電・プラズマ・パルスパワー/高電圧合同研究会  2021.1 

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  • New Electrode Systems for Decomposition of Persistent Substances in Water

    2010 

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  • Synergetic structure of sulfur-doped disordered carbon for sodium-ion exchange

    H. Kim, N. Takeuchi

    The 8th ICMAP  2021.1 

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  • Recovery of Fluorine from Perfluoro-compounds in Water During Decomposing Processes by Plasmas

    International Workshop on Plasmas with Liquids  2010 

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  • 電子スピン共鳴法を用いた希硫酸中におけるヒドロキシラジカル・硫酸イオンラジカルの反応機構解明

    村田菜緒, 立花孝介, 金澤誠司, 高橋克幸, 稗田純子, 竹内希, O.L. Li

    第22回静電気学会春期講演会  2021.3 

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  • 電気流体力学流発生における電子の影響

    齋藤悠輔, 竹内希, 安岡康一

    電気学会全国大会講演論文集  2010.3 

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  • 帯電物へのイオン流入分布計測回路の開発

    内御堂駆, 高橋克幸, 高木浩一, 竹内希, 山口晋一, 永田秀海

    第22回静電気学会春期講演会  2021.3 

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  • 水中気泡内プラズマによる有機フッ素化合物分解とフッ素イオンの回収

    小杉明弘, 竹内希, 安岡康一

    応用物理学関係連合講演会講演予稿集(CD-ROM)  2010.3 

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  • Numerical Simulation of an Electrohydrodynamic Gas Pump Driven by Corona Discharges

    TAKEUCHI Nozomi, YASUOKA Koichi

    電気学会研究会資料. PST, プラズマ研究会  2010.8 

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  • Conversion of ammonia nitrogen and urea in water into nitrate/nitrite nitrogen using plasma

    T. Sato, N. Takeuchi, D.B. Graves

    ISPlasma2021/IC-PLANTS2021  2021.3 

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  • Electrohydrodynamic Effect Induced by Gas Discharge Without Electronegative Gases

    TAKEUCHI Nozomi, IMAI Yoshitaka, SAITOU Yusuke, YASUOKA Koichi

    電気学会研究会資料. PST, プラズマ研究会  2010.5 

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  • 水中気泡内プラズマを用いたアンモニア溶液処理における水中生成物分析

    佐藤建, 竹内希

    誘電・絶縁材料/放電・プラズマ・パルスパワー/高電圧合同研究会  2021.1 

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  • Recovery of Fluorine from Perfluoro-compounds in Water During Decomposing Processes by Plasmas

    International Workshop on Plasmas with Liquids  2010 

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  • 液中プラズマ法によるナノ炭素材料合成とその放電条件依存性

    山崎翔矢, 竹内希

    誘電・絶縁材料/放電・プラズマ・パルスパワー/高電圧合同研究会  2021.1 

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  • Recovery of Fluorine from Perfluoro-compounds in Water During Decomposing Processes by Plasmas

    International Workshop on Plasmas with Liquids  2010 

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  • 多並列ダイヤフラム放電による過酸化水素生成特性

    渡辺泰一, 竹内希, 全俊豪

    第22回静電気学会春期講演会  2021.3 

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  • Degradation of Perfluoro Compounds and F- Recovery in Water

    International Symposium on Non-Thermal/Thermal Plasma Pollution Control Technology & Sustainable Energy  2010 

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  • 種々の溶液中でのソリューションプラズマの特性

    竹内希, 川原一真, 蒲生史郷, 今泉颯太, 全俊豪, Oi Lun, Helena Li

    SPP-38/SPSM33  2021.1 

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  • Electrohydrodynamic Effects Under Gas Discharges Without Electronegative Gases

    Pre-ISNTP-7 EHD Workshop for Fundamental, Enbironmental & Energy Application  2010 

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  • プラズマ照射条件が液中誘起流に与える影響

    釜崎雅大, 砂川風響, 西田佳祐, 竹内希, 光木文秋, 川崎敏之

    令和3年電気学会全国大会  2021.3 

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  • Decomposition of perfluoro compounds in water and recovery of fluorine ions by electrodialysis

    SAITO Yusuke, TAKEUCHI Nozomi, YASUOKA Koichi

    電気学会研究会資料. PPT, パルスパワー研究会  2010.10 

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  • 気液界面プラズマによる炭素粉体の親水化およびスルホン化

    竹内希

    令和3年電気学会全国大会  2021.3 

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  • 有機溶媒中キャビテーションとプラズマを併用した炭素材料合成

    山崎翔矢, 竹内希, 高奈秀匡

    第68回応用物理学会春季学術講演会  2021.3 

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  • Decomposition of perfluoro compounds in water and recovery of fluorine ions by electrodialysis

    SAITO Yusuke, TAKEUCHI Nozomi, YASUOKA Koichi

    電気学会研究会資料. PST, プラズマ研究会  2010.12 

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  • Analyses of generation and reaction mechanisms of radicals in plasma with liquid by numerical simulation Invited

    N. Takeuchi

    ISHPMNB 2021  2021.3 

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  • Reaction Analysis and Large-Capacity Reactor for Degrading Perfluorooctane Sulfonate in Water Using Atmospheric Plasmas

    HAYASHI Ryuichi, TAKEUCHI Nozomi, YASUOKA Koichi

    電気学会研究会資料. PST, プラズマ研究会  2010.12 

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  • プラズマによる水中有機フッ素化合物の高効率完全分解と分解過程

    安岡康一, 大保勇人, 竹内希

    日本オゾン協会年次研究講演会講演集  2011.6 

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  • Numerical Simulation of Chemical Reaction in DC Oxygen Plasma inside Bubbles in Water

    竹内希, 石井陽子, 安岡康一

    電気学会プラズマ研究会資料  2011.5 

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  • 水中気泡内プラズマ方式における有機フッ素化合物の吸着と高効率分解

    竹内希, 大石陵平, 北川譲, 安岡康一

    日本機械学会年次大会講演論文集(CD-ROM)  2011.9 

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  • 気泡制御を用いた水中気泡内プラズマの観測

    大保勇人, 竹内希, 安岡康一

    静電気学会講演論文集  2011 

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  • 水中プラズマによる有機フッ素化合物分解

    安岡康一, 大保勇人, 竹内希

    静電気学会講演論文集  2011 

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  • Study of Efficient Degradation of Perfluoro Compounds in Water Using DC Discharge Plasmas Generated within Bubbles

    KOSUGI Akihiro, KANNO Yu, TAKEUCHI Nozomi, YASUOKA Koichi

    電気学会研究会資料. PST, プラズマ研究会  2011.5 

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  • 水中気泡内直流プラズマによる有機フッ素化合物分解の高効率化への検討

    小杉明弘, 菅野悠, 林竜一, 竹内希, 安岡康一

    電気学会全国大会講演論文集  2011.3 

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  • 大気圧直流放電におけるOHラジカル分布計測

    安藤瑞基, 安間良祐, 竹内希, 安岡康一

    電気学会基礎・材料・共通部門大会講演論文集(CD-ROM)  2011.9 

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  • 交流駆動水中プラズマによる難分解有機フッ素化合物の高効率分解

    大保勇人, 竹内希, 安岡康一

    電気学会基礎・材料・共通部門大会講演論文集(CD-ROM)  2011.9 

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  • 有機フッ素化合物分解におよぼす針―水面グロー放電の極性効果

    北川譲, 竹内希, 安岡康一

    電気学会基礎・材料・共通部門大会講演論文集(CD-ROM)  2011.9 

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  • 水中気泡内直流プラズマを用いた有機フッ素化合物分解における溶液条件の影響

    小杉明弘, 竹内希, 安岡康一

    電気学会基礎・材料・共通部門大会講演論文集(CD-ROM)  2011.9 

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  • 気液界面プラズマと硫酸ラジカルイオンによる有機フッ素化合物分解過程の差異

    北川譲, 小杉明弘, 竹内希, 安岡康一

    静電気学会講演論文集  2012 

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  • S055013 Modelling of Mass Transfer at Plasma-Water Interface

    TAKEUCHI Nozomi, ANDO Mizuki, YASUOKA Koichi

    The Proceedings of Mechanical Engineering Congress, Japan  2012 

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    Plasmas generated at gas-liquid interface have been developed for water treatment. Reactive species, such as H202, 03, and OH radical, are mainly generated in the gas phase, and then transfer to the liquid phase. In this study, zero-dimensional numerical simulation of reactions in gas and liquid phases and the mass transfer through the gas-liquid interface was conducted for plasma generated inside oxygen bubbles. Comparison between the numerical and experimental results quantitatively revealed the reaction paths and phenomena at the plasma-liquid interface such as water vaporization due to the heat flux from the plasma to the water.

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  • 水面直流グロー放電を用いた有機フッ素化合物分解における放電長の影響

    ZHAO Fusheng, 大保勇人, 竹内希, 安岡康一

    電気学会基礎・材料・共通部門大会講演論文集(CD-ROM)  2011.9 

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  • 気液界面プラズマの有機フッ素化合物の吸着量計測による分解過程の検討

    松谷有里子, 竹内希, 安岡康一

    電気学会基礎・材料・共通部門大会講演論文集(CD-ROM)  2011.9 

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  • Evaluation of decomposing organic compound by plasma in bubbles

    SHIBATA Ryuichi, ANNMA Ryosuke, ANDO Mizuki, TAKEUCHI Nozomi, YASUOKA Koichi

    電気学会研究会資料. PPT, パルスパワー研究会  2011.12 

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  • Comparison of the decomposing rate of perfluoro compounds in water using plasmas

    YASUOKA Koichi, TAKEUCHI Nozomi

    電気学会研究会資料. ED, 放電研究会  2011.10 

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  • プラズマによる液中過酸化水素生成における液体電極の極性効果

    竹内希, 石橋直人

    電気学会基礎・材料・共通部門大会講演論文集(CD-ROM)  2017.9 

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  • Reduction of graphene oxide using solution plasma

    杉山剛志, 竹内希

    電気学会プラズマ研究会資料  2017.8 

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  • 針対水面直流放電による有機フッ素化合物PFOSの分解

    鈴木大輔, 竹内希

    第19回静電気学会春期講演会  2018.3 

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  • 水中およびエタノール中でのソリューションプラズマを用いた酸化グラフェンの還元

    川原一真, 杉山剛志, 竹内希

    第19回静電気学会春期講演会  2018.3 

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  • Decomposition of Acetic Acid Using Multiple Plasmas Generated within Bubbles

    竹内希, 竹内希, 石橋直人

    電気学会プラズマ研究会資料  2017.5 

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  • 多並列水中気泡内交流プラズマによる酢酸分解

    竹内希, 石橋直人

    電気学会全国大会講演論文集(CD-ROM)  2017.3 

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  • Reduction of Graphene Oxide Using Plasma in Liquid

    応用物理学会春季学術講演会講演予稿集(CD-ROM)  2018.3 

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  • 気液界面プラズマによる界面活性剤PFOS分解の特徴 Invited

    竹内希

    応用物理学会プラズマエレクトロニクス分科会新領域研究会  2018.3 

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  • Utilization of ozone in advanced oxidation process using plasma generated within oxygen bubbles

    竹内希, 竹内希, 石橋直人, KIM Hyunha

    日本オゾン協会年次研究講演会講演集  2018.6 

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  • Reduction of Graphene Oxide by Plasmas in Contact with Liquid Invited

    N. Takeuchi, T. Sugiyama

    SPM-6  2018.6 

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  • Importance of Ozone in Water Treatment Using Oxygen Plasmas Invited

    N. Takeuchi, N. Ishibashi, H.H. Kim

    ICMAP 2018  2018.7 

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  • コロナ放電の応用と数値シミュレーション Invited

    竹内希

    2018年度第2回静電気放電基礎研究委員会  2018.7 

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  • コロナ放電を用いた除電における印加電圧の影響

    久保勝也, 高橋克幸, 高木浩一, 竹内希, 山口晋一, 永田秀海

    2018年第42回静電気学会全国大会  2018.9 

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  • 水中気泡内交流放電による有機フッ素化合物PFOSの分解

    鈴木大輔, 竹内希

    2018年第42回静電気学会全国大会  2018.9 

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  • Importance of Ozone Utilization in Plasma-Based Advanced Oxidation Process

    N. Takeuchi, N. Ishibashi, H.H. Kim, O.L. Li

    ISNTP-11  2018.7 

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  • Surface Modification of Carbon Acid Catalysts by Plasma Process for Biomass Conversion

    O.L. Li, R. Ikura, T. Ishizaki, N. Takeuchi

    ISNTP-11  2018.7 

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  • Gas Flow-Assisted Electrospray of Water and Ethanol

    H.H. Kim, N. Takeuchi, Y. Teramoto, A. Ogata

    ISNTP-11  2018.7 

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  • Influence of Arc Discharge on Contact Erosion and Contact Resistance in a Hybrid DC Switch

    C. Ou, R. Nakayama, S. Zen, N. Takeuchi, K. Yasuoka

    63rd IEEE Holm Conference on Electrical Contacts  2018.10 

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  • Study on Cu-W Composite Contact Materials with Arc-less Current Commutation in a Hybrid DC Switch

    M. Chen, Y. Yamada, S. Zen, N. Takeuchi, K. Yasuoka

    63rd IEEE Holm Conference on Electrical Contacts  2018.10 

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  • Dynamic Simulation Model of Molten Bridge in a Hybrid DC Circuit Breaker

    M. Chen, N. Takeuchi, K. Yasuoka

    ICFD 2018  2018.11 

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  • Plasma candle: A new type of atmospheric pressure plasma jet

    H.H. Kim, Y. Teramoto, N. Takeuchi, A. Ogata

    ISPlasma2019/IC-PLANTS2019  2019.3 

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  • プラズマアクチュエータで誘起されるガス流のレーザドップラ計測

    竹内希, 安岡康一, 石井彰三

    応用物理学関係連合講演会講演予稿集  2007.3 

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  • 水中気泡内プラズマによる種々の有機物分解

    竹内希

    平成31年電気学会全国大会  2019.3 

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  • Plasma Behavior and Temporal Flow Velocity in AC Plasma Actuator

    2007 IEEE International Conference of Plasma Science  2007 

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  • Decomposition of various organic compounds by microplasmas generated within oxygen bubbles in water

    N.Takeuchi

    IWM-10  2019.5 

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  • Electrohydrodynamic Gas Flow Generation with a Wire Electrode

    2008 

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  • Influence of applied voltage on electrostatic elimination using corona discharge

    K. Kubo, K. Takahashi, K. Takaki, N. Takeuchi, S. Yamaguchi, H. Nagata

    IWM-10  2019.3 

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  • Streamer Extension and Electrohydrodynamic Flow Generation with Single Barrier Surface Discharge

    TAKEUCHI Nozomi, YASUOKA Koichi

    電気学会研究会資料. PST, プラズマ研究会  2007.12 

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  • Decomposition of PFOS Using AC Discharge Plasma within Bubbles in Water

    D. Suzuki, N. Takeuchi

    EAPETEA-6  2018.11 

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  • Aerodynamic Noise Reduction by Plasma Actuators

    TAKEUCHI Nozomi, YASUOKA Koichi, ISHII Shozo

    電気学会研究会資料. PST, プラズマ研究会  2006.5 

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  • Observation of Solution Plasma Process in Water-Ethanol Mixed Solution

    K. Kawahara, F. Gamou, N. Takeuchi

    EAPETEA-6  2018.11 

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  • プラズマを用いた水処理におけるオゾンの有効利用 Invited

    竹内希

    日本オゾン協会第36回オゾン技術に関する講習会  2018.12 

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  • Measurement of instantaneous Gas Flow Induced by Plasma Actuator with Laser Doppler Velocimeter

    Int. Symp. Plasma Chemistry  2007 

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  • 水面上の放電が誘起する気相・液相流による活性種輸送 Invited

    竹内希

    日本機械学会流体工学部門プラズマアクチュエータ研究会第6回シンポジウム  2018.11 

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  • Measurement of instantaneous Gas Flow Induced by Plasma Actuator with Laser Doppler Velocimeter

    Int. Symp. Plasma Chemistry  2007 

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  • Evaluation of discharge characteristics of solution plasma in ethanol-water mixed solution

    F. Gamou, K. Kawahara, N. Takeuchi

    XXXIV ICPIG & ICRP-10  2019.7 

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  • The Effect of Discharge Wire Electrode Diameter on the Flow Characteristics of Wire-Rod Type Electrohydrodynamic Gas Pump

    6th Conference of the French Electrostatics Society  2008 

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  • Plasma candle: A new type of plasma-jet

    H.H Kim, Y. Teramoto, N. Takeuchi, A. Ogata

    ISPC 24  2019.6 

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  • AC Ionizer Using Piezoelectric Transformer as Electrode

    6th Conference of the French Electrostatics Society  2008 

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  • プラズマアクチュエータで誘起されるガス流のレーザドップラ計測

    第55回応用物理学関係連合学術講演会  2008 

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  • Effects of additions of ethanol and fine bubbles on generation of plasmas in water solution

    N.Takeuchi, F. Gamou, K. Kawahara

    ISNPEDADM 2019  2019.10 

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  • 電気流体力学効果の活性種輸送促進への適用

    竹内希

    第2回電磁界応答流体技術調査専門委員会  2019.12 

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  • 同一平面電極型表面バリア放電における電気流体力学流の発生

    竹内希, 安岡康一

    応用物理学関係連合講演会講演予稿集  2008.3 

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  • Decomposition of Acetic Acid with Different Input Power

    T. Watanabe, N. Takeuchi, S. Zen

    APSPT-11  2019.12 

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  • The Effect of Discharge Wire Electrode Diameter on the Flow Characteristics of Wire-Rod Type Electrohydrodynamic Gas Pump

    6th Conference of the French Electrostatics Society  2008 

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  • 水中気泡内プラズマの水処理および農業応用 Invited

    竹内希

    仙台プラズマフォーラム  2020.2 

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  • Electrohydrodynamic Gas Flow Generation by a Surface Barrier Discharge inside a Narrow Channel

    TAKEUCHI Nozomi, YASUOKA Koichi

    電気学会研究会資料. PST, プラズマ研究会  2008.12 

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  • 電気流体力学効果による活性種の液相への吸収促進 Invited

    竹内希

    2nd Science Meeting for Plasma and Nanobubble Research (413th RISH symposium)  2019.12 

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    Language：Japanese   Presentation type：Oral presentation (invited, special)  

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  • Influence of Surface Charge on Electrohydrodynamic Flow driven by Dielectric-Barrier Discharge

    HAMASAKI Takashi, TAKEUCHI Nozomi, YASUOKA Koichi, SAKURAI Takeki

    電気学会研究会資料. PST, プラズマ研究会  2008.12 

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  • Detailed investigation of AC discharge characteristics in organic solvents

    F. Gamou, T. Koizumi, K. Kawahara, N. Takeuchi

    EAPETEA-7  2019.11 

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  • 大気圧コロナ放電のイオン・オゾン生成特性

    第9回静電気学会春期講演会  2008 

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  • Cavitation flow to generate plasma in highly conductive liquid

    N. Takeuchi, T. Koizumi, S. Yamazaki

    ICFD 2019  2019.11 

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    Language：English   Presentation type：Oral presentation (general)  

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  • ワイヤ－ロッド型電気流体力学ガス・ポンプのパルス重畳直流駆動

    第9回静電気学会春期講演会  2008 

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  • Direct Magnesium Nitride Synthesis Using Atmospheric-Pressure Dielectric Barrier Discharge

    Y. Huang, S. Zen, N. Takeuchi

    EAPETEA-7  2019.11 

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    Language：English   Presentation type：Oral presentation (general)  

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  • AC Ionizer Using Piezoelectric Transformer as Electrode

    6th Conference of the French Electrostatics Society  2008 

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    Presentation type：Poster presentation  

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  • A study on modification of functional group within 2D-like carbon material using gas-liquid interface plasma

    H. Kim, N. Takeuchi

    EAPETEA-7  2019.11 

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    Language：English   Presentation type：Oral presentation (general)  

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  • Electrohydrodynamic Gas Flow Generation with a Wire Electrode

    2008 

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    Presentation type：Poster presentation  

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  • Observation of the tall structure lightning by an advanced optical technique

    4th International Workshop on Electromagnetic Radiation from Lightning to Tall Structures  2009 

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  • 水中気泡内プラズマによる酢酸分解におけるオゾン生成の影響

    渡辺泰一, 全俊豪, 竹内希

    第21回静電気学会春期講演会  2020.3 

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    Language：Japanese   Presentation type：Oral presentation (general)  

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  • One-dimensional Analysis of a Wire-Rod TypeElectrohydrodynamic Gas Pump

    2009 IEEE Conference on Electrical Insulation and Dielectric Phenomena  2009 

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  • Application of dielectric barrier discharge using macro-porous electrode to ultraviolet light source

    KUBOTA Satoshi, TAKEUCHI Nozomi, YASUOKA Koichi, ISHII Shozo, NAKAI Masumi, HASUO Shunji

    電気学会研究会資料. ED, 放電研究会  2005.1 

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  • Surface Modification of Thin Dielectric Materials by Compact Theta-Pinch Plasma

    2005 IEEE International Conference of Plasma Science  2005 

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    Presentation type：Oral presentation (general)  

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  • Aerodynamic Noise Control by Atmospheric Glow Discharge Plasma

    2006 IEEE International Conference on Plasma Science  2006 

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    Presentation type：Oral presentation (general)  

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  • 水中気泡内プラズマを用いた水処理装置大容量化の基礎実験

    柴田龍一, 大保勇人, 竹内希, 安岡康一

    電気学会全国大会講演論文集  2012.3 

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  • プラズマと溶液界面での有機フッ素化合物吸着量と分解速度の関係

    竹内希, 松谷有里子, 安岡康一

    電気学会全国大会講演論文集  2012.3 

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  • プラズマ－液体相互作用とその環境・材料応用 Invited

    竹内希

    2025年度第一回静電気学会研究会  2025.3  静電気学会

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  • Development of Carbon Sulfonation Process Using Plasma in Contact with Liquid Invited International coauthorship International conference

    Nozomi Takeuchi, Siqi Deng, Manabu Kodama, Katsuyuki Takahashi, Kosuke Tachibana, Junko Hieda, Oi Lun Li

    BMMP 2025  2025.1 

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  • 促進酸化処理におけるオゾン/過酸化水素供給速度の影響 Invited

    竹内希

    日本オゾン協会第41回オゾン技術に関する講習会  2024.12  日本オゾン協会

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    Language：Japanese   Presentation type：Oral presentation (invited, special)  

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  • イオナイザを用いた除電における高効率イオン輸送条件 Invited

    竹内希, 高橋克幸, 高木浩一, 山口晋一, 永田秀海

    COMSOL CONFERENCE 2024 Tokyo  2024.12 

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    Language：Japanese   Presentation type：Oral presentation (invited, special)  

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  • Carbon sulfonation using plasma: trial to enlarge treatment capacity Invited International coauthorship International conference

    Nozomi Takeuchi, Siqi Deng, Kaixun Yao, Katsuyuki Takahashi, Kosuke Tachibana, Junko Hieda, Oi Lun Li

    245th ECS Meeting  2024.5  The Electrochemical Society

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Industrial property rights

  • 直流遮断器

    安岡康一, 竹内希, 坪井祥紀, 早川達也, 全俊豪

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    Application no：特願2018-502965  Date applied：2017.2

    Announcement no：特開WO2017/150079  Date announced：2018.12

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  • 酸化グラフェン、酸化グラフェン分散液及び酸化グラフェンの製造方法

    堤 聖晴, 西尾 直高, 大塚 喜弘, 竹内 希, 星野 修平

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    Applicant：株式会社ダイセル, 国立大学法人東京工業大学

    Application no：特願2016-039328  Date applied：2016.3

    Announcement no：特開2017-154928  Date announced：2017.9

    J-GLOBAL

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  • 成膜装置

    竹内 希, 中谷内 裕徳

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    Applicant：国立大学法人東京工業大学

    Application no：特願2014-224440  Date applied：2014.11

    Announcement no：特開2016-088802  Date announced：2016.5

    J-GLOBAL

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Awards

  • 第28回電気学会優秀技術活動賞，技術報告賞

    2025.6   電気学会   プラズマ材料表面処理技術の最新動向

    プラズマ材料表面処理技術の動向調査専門委員会

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  • プラズマ材料科学賞，奨励部門賞

    2025.1   名古屋大学低温プラズマ科学研究センター  

    竹内希

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  • 研究賞

    2023.9   静電気学会   プラズマ水処理に関する研究

    竹内希

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  • 著作賞

    2023.9   静電気学会   基礎からの高電圧工学

    高木浩一,向川政治,竹内希,高橋克幸,門脇一則

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  • 業績賞

    2016   関東工学教育協会  

    竹内 希

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  • 8th Asia-Pacific International Symposium on the Basics and Applications of Plasma Technology, Best Oral Paper Award

    2013  

    竹内 希

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  • 増田賞

    2012   静電気学会  

    竹内 希

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  • 優秀論文発表賞A賞

    2012   電気学会  

    竹内 希

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  • 手島精一記念研究賞 博士論文賞

    2010  

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    Country：Japan

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  • 春期講演会ベストプレゼンテーション賞

    2009   静電気学会  

    竹内 希

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  • International Symposium on Electrohydrodynamics, Best Presentation Award

    2009   IEEE DEIS  

    竹内 希

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Research Projects

  • 未知PFASの出現にロバストな検出・除去技術の統合的開発プラットフォーム

    Grant number：25K21821  2025.6 - 2028.3

    日本学術振興会  科学研究費助成事業  挑戦的研究(開拓)

    藤井 学, 權 垠相, 磯部 敏宏, 劉 吉寶, 竹内 希

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    Grant amount：\25870000 （ Direct Cost: \19900000 、 Indirect Cost：\5970000 ）

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  • 液面上パルス放電が誘起する気液界面反応場の時空間マルチスケール解析とその高度制御

    Grant number：24K00860  2024.4 - 2027.3

    日本学術振興会  科学研究費助成事業  基盤研究(B)

    高橋 克幸, 高木 浩一, 馬渕 拓哉, 竹内 希

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    Grant amount：\18590000 （ Direct Cost: \14300000 、 Indirect Cost：\4290000 ）

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  • ダイヤフラム放電プラズマとオゾンを併用した有機排水処理技術の深化

    Grant number：23K26088  2023.4 - 2026.3

    日本学術振興会  科学研究費助成事業  基盤研究(B)

    竹内 希, 平川 力

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    Grant amount：\19110000 （ Direct Cost: \14700000 、 Indirect Cost：\4410000 ）

    両極性パルス電圧により駆動される，ダイヤフラム放電プラズマによる過酸化水素生成特性を調査した。印加電圧振幅，周波数，および液温をパラメータとすると，電圧または周波数を高くして投入電力を大きくしたとき，過酸化水素の生成速度は投入電力と正の相関を示した一方で，生成効率はある程度の値で飽和する傾向となった。また，液温を室温程度から沸点程度まで変化させた結果，過酸化水素の生成効率が60～70℃付近で最高となり，印加する電圧に対して微細孔で形成された気泡の形状と気泡の安定形成が，過酸化水素生成の最適条件とその条件における生成効率を決定づけると結論づけた。
    ダイヤフラム放電プラズマの発光分光計測によって，電子密度，電子温度，およびガス温度を算出したところ，電子密度が最高で10^22 m^-3オーダ，電子温度およびガス温度が数千Kとなった。また，過酸化水素生成の第1段階であると考えられる，水分子の解離に伴うOHラジカル生成の素反応の反応速度を検討した結果，電子衝突による解離反応よりも熱分解による解離反応が支配的であることが示された。
    過酸化水素とオゾンを用いた促進酸化処理によって，酢酸の分解実験を行った。オゾンは，散気管，または，散気管よりも微細な気泡を生成できるマイクロバブル発生器を用いて処理液に供給した。オゾン利用率（処理液中に吸収されるオゾンの割合）はマイクロバブル発生器を用いた場合の方が高く，また，全有機炭素（TOC）の減少速度も大きくなったことから，オゾン気泡の微細化によるTOC分解反応の促進が確認できた。

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  • Plasma-modified peptides/proteins for multi-target anticancer treatment

    Grant number：22H01212  2022.4 - 2027.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

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    Grant amount：\17290000 （ Direct Cost: \13300000 、 Indirect Cost：\3990000 ）

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  • Plasma-modified peptides/proteins for multi-target anticancer treatment

    Grant number：23K22483  2022.4 - 2027.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

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    Grant amount：\17290000 （ Direct Cost: \13300000 、 Indirect Cost：\3990000 ）

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  • Development of catalyst synthesis technology for highly efficient conversion of cellulosic waste by using low-temperature and environment-friendly plasma

    Grant number：3RF-2201  2022.4 - 2025.3

    Environmental Restoration and Conservation Agency (ERCA) 

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  • 高度制御高電圧バーストパルスを用いた水面上パルス放電による気液界面現象の解明

    Grant number：21K03994  2021.4 - 2024.3

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    高橋 克幸, 高木 浩一, 竹内 希

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    Grant amount：\4160000 （ Direct Cost: \3200000 、 Indirect Cost：\960000 ）

    液面放電を連続的に発生することが可能な高電圧バーストパルス発生電源の開発を行った。構成として、パルス電源には、MOS-FETとコンデンサによって構成した回路を用いた。パルス電源は2回路用い、その出力端を、ダイオードで結合することによって、200 ns以上の遅延時間で連続的に2回のパルス電圧の発生を可能とした。またパルス幅は200 ns以上で可変であり、制御性が高いことを確認した。パルス発生電源の開発に平衡して、単発パルス放電の特性評価を行った。ICCDカメラは露光時間を20 nsとして連続的な撮影を行った。その結果、液面放電の進展速度は導電率に依らず0.3~0.4 mm/ns程度となり、正極性に比べ負極性の方がわずかに速度が速いことがわかった。放電の様相も正極よりも負極の方が直進に進展しており進展長も長いことがわかった。放電の進展長は、導電率が高い場合に減少する。次に、有機染料であるインジゴカルミンをヒドロキシラジカルの化学プローブとして用い、溶液中へのラジカル供給効率を評価した。有機染料の分解量すなわち、溶液へのヒドロキシラジカルの供給量は正極の方が大きいことがわかった。また、ヒドロキシラジカルの再結合によって生成される過酸化水素を測定したところ、過酸化水素の生成量も同様に正極の方が大きく、溶液へのヒドロキシラジカルの溶解量が大きいことがわかった。また、また，接地電極材料として鉄や銅を使用した場合、それぞれ正極、負極性に、白金やステンレスを使った場合と比較し、有機染料の分解量が増加する傾向にあることがわかった。これは接地電極から溶け出した金属イオンによる酸化力が要因だと考えられる。

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  • Precious-metal-less hydrogenation reaction catalyst synthesis by combined process of plasma in liquid and electrospray

    Grant number：20K20997  2020.7 - 2022.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Challenging Research (Exploratory)

    Takeuchi Nozomi

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    Grant amount：\6370000 （ Direct Cost: \4900000 、 Indirect Cost：\1470000 ）

    Plasma in an organic solvent with ultrasonic cavitation could synthesize carbon materials with a large specific surface area by introducing microbubbles and liquid flow to the plasma reaction field. Also, it was confirmed that nickel particles were produced from the nickel electrode and supported on the carbon materials. The catalytic performance of the synthesized material for oxygen reduction reaction was enhanced by annealing treatment and higher onset voltage was achieved. The use of pyridine, an organic solvent containing nitrogen, instead of xylene would enable doping of nitrogen into the carbon material, and together with the supported nickel particles, it is expected to synthesize excellent hydrogenation reaction catalysts due to the spillover effect.

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  • Synthesis of Na-doped carbon materials with nanospaces by plasma in liquid for seawater battery application

    Grant number：19H01890  2019.4 - 2022.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    Takeuchi Nozomi

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    Grant amount：\17550000 （ Direct Cost: \13500000 、 Indirect Cost：\4050000 ）

    New synthesis methods of sulfur-doped carbon materials by plasma in liquid were developed for application to anode materials of sodium-ion batteries. First, the stable formation conditions of plasma in liquid were clarified by investigating electrical characteristics and detailed observation of the plasma. Then, carbon materials were synthesized by plasmas in xylene, thiophene, and xylene with dissolved sulfur. The performance of the synthesized carbon materials as catalysts for oxygen reduction reaction and as anode materials for sodium-ion battery were evaluated. The results showed that the sulfur content in the carbon material improved the catalytic activities and performances of batteries.

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  • Innovative arcless hybrid interrupting technology with finely structured hardness contacts

    Grant number：18H01420  2018.4 - 2021.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    Yasuoka Koichi

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    Grant amount：\17290000 （ Direct Cost: \13300000 、 Indirect Cost：\3990000 ）

    Aiming to establish a breaking technology that can open and close an DC current over several hundred amperes without generating arc. In the first year, the arcless current interruption of 200 A was demonstrated using contacts of tungsten material, which has the highest melting point.
    In the following year, the relationship between contact resistance and surface roughness was studied experimentally. Based on the result, the contact resistance was reduced to 0.3 mΩ, which was about twice that of copper contacts. Furthermore, new-type of copper-clad tungsten contacts were developed to promote heat dissipation locally concentrated on the electrode surface and prevent boiling of the contact material. The arcless current was increased to 400A. Another type of contacts that consisted of two or three contact materials was proposed. We succeed to increase the arcless commutation current up to 700 A in experiments using the variable resistance contacts.

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  • Treatment of wastewater with highly concentrated organic compounds using multiple plasmas generated within gas bubbles

    Grant number：15H05516  2015.4 - 2017.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (A)  Grant-in-Aid for Young Scientists (A)

    Takeuchi Nozomi

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    Grant amount：\21060000 （ Direct Cost: \16200000 、 Indirect Cost：\4860000 ）

    Plasma generated within oxygen gas bubbles was used for the decomposition of persistent organic compounds in water. The plasma was generated at 21 treatment holes in parallel, and hydrogen peroxide and ozone were selectively generated in each hole. In addition to the OH radicals generated by the plasma directly, OH radicals generated by the reaction involving hydrogen peroxide and ozone were effectively used for the decomposition of organic compounds. This plasma treatment achieved a higher energy efficiency and a higher decomposition rate than other plasma methods. Quantitative estimation of the amount of OH radical in water was also achieved using a chemical probe. Furthermore, the generation mechanism of hydrogen peroxide in plasma with liquid electrode was revealed by a numerical simulation model.

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  • Innovative rapid processing for persistent wastewater using a gas-liquid plasma reactor

    Grant number：26249032  2014.4 - 2017.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)  Grant-in-Aid for Scientific Research (A)

    YASUOKA Koichi, NISHIYAMA Hideya

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    Grant amount：\37830000 （ Direct Cost: \29100000 、 Indirect Cost：\8730000 ）

    High conductive produced water associated with crude oil production contains highly concentrated organic compounds. In this study, a plasma-based advanced oxidation system has been proposed, in which hydroxyl radial (OH) is generated in water by the hydrogen peroxide (H2O2) and ozone (O3) method. A diaphragm discharge in water produced H2O2 at high rate by using repetitive bipolar rectangular voltages. Ten diaphragm discharges in a solution with a conductivity over 30 mS/cm generated H2O2 at a rate of 2.7 g/h and an energy yield of 2.3 g/kWh. Energy efficiency of 1.6 gTOC/kWh in the decomposition of acetic acid was obtained by feeding micro bubble ozone-gas. The efficiency is higher than that of conventional advanced oxidation systems. The numerical simulation results showed that effective treatment of acetic acid can be achieved when the H2O2 supply rate is half of the O3 absorption rate as one H2O2 and two O3 molecules are necessary to produce two OH radicals.

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  • Enhancement of plasma-liquid mass transfer of active species and decomposition of organic compounds in water using electrohydrodynamic effect

    Grant number：25790071  2013.4 - 2015.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)  Grant-in-Aid for Young Scientists (B)

    TAKEUCHI Nozomi

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    Grant amount：\4420000 （ Direct Cost: \3400000 、 Indirect Cost：\1020000 ）

    Decomposition of acetic acid in water using plasma on gas-liquid interface and numerical simulation of reactions considering flows and mass transfer were conducted. It was revealed that the gas flow generated by an electrohydrodynamic effect was not effective to enhance the mass transfer of OH radical and hydrogen peroxide transferred to the solution restrained the decomposition of acetic acid.
    The addition of ozone into the solution seemed to be effective because OH radical can be re-generated by a reaction between ozone and hydrogen peroxide. The selectivity in generations of OH radical and hydrogen peroxide or ozone has been enhanced by controlling the input power to plasma generated in gas bubbles. It is expected that multiple generation of the plasmas at different powers achieves highly efficient decomposition system of organic compounds in water.

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  • Advanced Functionalization of Plasma Bubble Flow Systems by Microdischarge and Its Innovative Applications

    Grant number：23246032  2011.11 - 2014.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)  Grant-in-Aid for Scientific Research (A)

    NISHIYAMA Hideya, TANAKA Yasunori, TAKANA Hidemasa, YASUOKA Koichi, TAKEUCHI Nozomi

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    Grant amount：\23790000 （ Direct Cost: \18300000 、 Indirect Cost：\5490000 ）

    OH and O radicals are successfully generated in the original and improved multiple bubble jet systems with pulsed discharge. Then water treatment characteristics such as decomposion of harmful persistent substances in solution were clarified experimentally. The dynamic behavior of bubble jet with discharge, streamer propagation at the bubble interface and radicals generation in the treated solution were investigated. The docomposition rate and energy efficiency of methylene blue and acetic acid were clarified for the applied voltage, duty ratio, frequency, gas flow rate and systems configuration for the optimized water treatment processes. Furthermore, the dynamic behavior model of bubble in a fine tube under DC discharge was proposed by visulalization analysis. Finally, plasma chemistry model was also established to clarify the radical generation process and radical life time in a bubble with high pressure and high temperature conditions.

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  • マイクロチャネルにおける電気流体力学効果を用いた気体・液体輸送

    Grant number：08J05961  2008 - 2009

    日本学術振興会  科学研究費助成事業 特別研究員奨励費  特別研究員奨励費

    竹内 希

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    Grant amount：\1200000 （ Direct Cost: \1200000 ）

    本研究は,電気流体力学(electrohydrodynamic : EHD)効果をサブミリメートル級の微細流路内で発生させることで微小ポンプを形成し,CPU等の間接冷却技術への応用を目的として,気体または液体冷媒の輸送効率の向上を目指す。EHD効果とは,電界の存在下で流体に力が働き,EHD流と呼ばれる流れを発生する現象である。昨年度は,大気圧空気放電下で発生するEHD効果を利用した,ワイヤーロッド型EHDガスポンプの研究を進め,機械式ファンよりも高い気体搬送効率を達成した。本年度は,このワイヤーロッド型EHDガスポンプの解析を進めた。
    まず,EHDガスポンプの一次元ベルヌーイモデルを構築した。ポンプの損失係数は,レイノルズ数が小さい領域ではレイノルズ数の増加に対して減少するが,レイノルズ数が大きい領域ではレイノルズ数の増加と共に増加した。レイノルズ数が小さい範囲での損失係数の減少は,流路壁面での摩擦圧力損失の減少,レイノルズ数が大きい範囲での損失係数の増加は,電極によるマイナ損失の増加がそれぞれ主要因であると考えられる。それぞれの損失の計算値は,流路内で層流を仮定した場合に比べ大きくなった。これは,EHD流のもつ渦構造が原因であると考えられる。流路内の流れ構造を観測する手法としては,作動流体である空気に微粒子を含ませることによる可視化,または,数値計算が挙げられる。まず,流路内に線香の粒子を供給し,レーザを照射することで散乱光による可視化を行った。この結果,流路内でのカルマン渦の形成が確認された。次に,有限要素法を用いた二次元モデルの計算を行い,実験結果と比較した。このモデルでは,ナビエーストークス方程式の外力項にクーロン力を加えることで,イオンから中性分子への運動量移行を計算しており,可視化の実験結果と同様のカルマン渦が確認された。

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Teaching Experience

  • 環境浄化工学実験

    2024.10 Institution：東京科学大学

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  • 高電圧工学

    2024.10 Institution：東京科学大学

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  • 電気法規および施設管理

    2024.10 Institution：東京科学大学

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  • 工学基礎概論

    2024.10 Institution：東京科学大学

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  • 電力工学実験

    2024.10 Institution：東京科学大学

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  • Pulsed Power Engineering

    2024.10 Institution：Institute of Science Tokyo

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  • 環境浄化工学実験

    2020.4 - 2024.9 Institution：東京工業大学

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  • Pulsed Power Technology

    2015.4 - 2024.9 Institution：Tokyo Institute of Technology

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  • 高電圧工学

    2014.4 - 2024.9 Institution：東京工業大学

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  • Plasma Engineering

    2014.4 - 2016.3 Institution：Tokyo Institute of Technology

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  • 電力工学実験

    2012.4 - 2024.9 Institution：東京工業大学

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  • 電気電子工学実験１

    2012.4 - 2013.3 Institution：東京工業大学

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  • 電気電子工学実験第５

    2010.4 - 2012.3 Institution：東京工業大学

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  • 電気電子工学実験第１

    2010.4 - 2012.3 Institution：東京工業大学

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