Organization
School of Engineering Professor
Title
Professor
External link
AKASAKA HIROKI
Degree
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Dr. of Eng. ( 2007.9 Tokyo Institute of Technology )
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Master of Engineering ( 2002.3 Nagaoka University of Technology )
Research Areas
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Nanotechnology/Materials / Inorganic materials and properties
Education
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Tokyo Institute of Technology Graduate School of Engineering, Department of Mechanical Science and Engineering
2004.4 - 2007.9
Country： Japan
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Univ. of Minnesota High Temp. Plasma Lab. Exchange Stundent.
2006.1 - 2006.7
Country： United States
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Nagaoka University of Technology School of Engineering Department of Materials Science and Engineering
2000.4 - 2002.3
Country： Japan
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Nagaoka University of Technology Dept. of Materials Science and Technology
1998.4 - 2000.3
Country： Japan
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Tokyo National Collage of Technology Department of Electrical Engineering
1992.4 - 1998.3
Country： Japan
Research History
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Institute of Science Tokyo School of Engineering Department of Mechanical Engineering Prof.
2024.10
Country：Japan
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Tokyo Institute of Technology School of Engineering Department of Mechanical Engineering Prof.
2024.7 - 2024.9
Country：Japan
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Tokyo Institute of Technology School of Engineering, Department of Mechanical Engineering Assoc. Prof.
2016.4 - 2024.6
Country：Japan
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Tokyo Institute of Technology Department of Mechanical Sciences and Engineering Assoc. Prof.
2012.4 - 2016.3
Country：Japan
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Nagaoka University of Technology Dept. of Materials Science and Technology Assist. Prof.
2008.1 - 2012.3
Country：Japan
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CITIZEN WATCH CO.,LTD. Electronic Device Division, Crystal Device field
2002 - 2004
Professional Memberships
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応用物理学会
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The Japan Society of Mechanical Engineers
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The Japan Society of Applied Physics
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日本機械学会
Papers
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Joining and transfer of hydrogenated amorphous carbon films using laser irradiation
Dai Harada, Karyu Hase, Yuko Aono, Koji Tamada, Yuki Hirata, Naoto Ohtake, Hiroki Akasaka
DIAMOND AND RELATED MATERIALS 158 2025.10
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Yuki Hirata, Yuya Tamura, Bishnu Choudhary, Tetsuya Yamada, Kanta Yoshii, Hiroki Akasaka, Naoto Ohtake
ACS Applied Nano Materials 8 ( 22 ) 11274 - 11284 2025.5
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Characterization of structural and mechanical properties of DLC films deposited on the surface of minute-scale 3D objects: Changes in the incident behavior of carbon ions
Yuto Tameno, Yuki Hirata, Takumi Ishikawa, Hiroki Akasaka, Naoto Ohtake, Hiroshige Matsuoka
Surface and Coatings Technology 490 131193 - 131193 2024.8
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Investigation of vacancy-type defects in diamond-like carbon films using slow positron beam
Kazuhiro Kanda, Tomohiro Mishima, Hiroki Akasaka, Fuminobu Hori, Atsushi Yabuuchi, Atsushi Kinomura
JAPANESE JOURNAL OF APPLIED PHYSICS 63 ( 4 ) 2024.4
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Developing a Synthesis Process for Large-Scale h-BN Nanosheets Using Magnetron Sputtering and Heat Annealing Reviewed
Yuki Hirata, Kanta Yoshii, Mikito Yoshizato, Hiroki Akasaka, Naoto Ohtake
Advanced Engineering Materials 25 ( 23 ) 2023.12
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Characterization of structural and mechanical properties of DLC films deposited on the surface of minute-scale 3D objects: Comparison of PECVD and FCVA deposition technique Reviewed
Yuki Hirata, Kotaro Kawai, Toyohiro Kato, Hayata Fujimoto, Yuto Tameno, Takumi Ishikawa, Hiroshige Matsuoka, Hiroki Akasaka, Naoto Ohtake
Surface and Coatings Technology 460 129401 - 129401 2023.5
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Characterization of carburized layer on low-alloy steel fabricated by hydrogen-free carburizing process using carbon ions Reviewed
Takeshi Konno, Toyohiro Kato, Toshiaki Yanagida, Hiroshi Inaba, Yuki Hirata, Hiroki Akasaka, Naoto Ohtake
Diamond and Related Materials 135 2023.5
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X-ray photoemission electron microscopy observation of wear tracks on hydrogenated amorphous carbon films after ball-on-disk tests Reviewed
Sota Norizuki, Sarayut Tunmee, Chanan Euaruksakul, Ukit Rittihong, Keisuke Suzuki, Masashi Tomidokoro, Hideki Nakajima, Yuki Hirata, Naoto Ohtake, Hiroki Akasaka
Diamond and Related Materials 132 2023.2
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Oriented sp2 bonded carbon structure of hydrogenated amorphous carbon films Reviewed
Naoki Umada, Kazuhiro Kanda, Masato Niibe, Yuki Hirata, Naoto Ohtake, Hiroki Akasaka
Diamond and Related Materials 131 109533 - 109533 2023.1
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Investigation of the structure and tribological properties of laser-irradiated hydrogenated amorphous carbon films Reviewed
Dai Harada, Sarayut Tunmee, Chanan Euaruksakul, Ukit Rittihong, Hideki Nakajima, Yuko Aono, Yuki Hirata, Naoto Ohtake, Hiroki Akasaka
Diamond and Related Materials 131 2023.1
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Deposition phenomena of diamond-like carbon coating on inner surface of circular metal tube by nanopulse plasma chemical vapor deposition Reviewed
Yoshinao Iwamoto, Yuki Hirata, Ryouta Takamura, Hiroki Akasaka, NAOTO OHTAKE
Diamond & Related Materials 121 2022.1
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Deposition of graphene-copper composite film by cold spray from particles with graphene grown on copper particles Reviewed
Jongbeom Choi, Nana Okimura, Takatoshi Yamada, Yuki Hirata, Naoto Ohtake, Hiroki Akasaka
DIAMOND AND RELATED MATERIALS 116 2021.6
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Synthesis of Multilayered DLC Films with Wear Resistance and Antiseizure Properties Reviewed
Yucheng Li, Jun Enomoto, Yuki Hirata, Hiroki Akasaka, Naoto Ohtake
MATERIALS 14 ( 9 ) 2021.5
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Electrical Conduction Properties of Hydrogenated Amorphous Carbon Films with Different Structures Reviewed
Masashi Tomidokoro, Sarayut Tunmee, Ukit Rittihong, Chanan Euaruksakul, Ratchadaporn Supruangnet, Hideki Nakajima, Yuki Hirata, Naoto Ohtake, Hiroki Akasaka
MATERIALS 14 ( 9 ) 2021.5
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Effect of Soft X-ray Irradiation on Film Properties of a Hydrogenated Si-Containing DLC Film Reviewed
Kazuhiro Kanda, Ryo Imai, Shotaro Tanaka, Shuto Suzuki, Masahito Niibe, Takayuki Hasegawa, Tsuneo Suzuki, Hiroki Akasaka
Materials 14 ( 4 ) 924 - 924 2021.2
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Structural and Mechanical Properties of a-BCN Films Prepared by an Arc-Sputtering Hybrid Process Reviewed
Yuki Hirata, Ryotaro Takeuchi, Hiroyuki Taniguchi, Masao Kawagoe, Yoshinao Iwamoto, Mikito Yoshizato, Hiroki Akasaka, Naoto Ohtake
MATERIALS 14 ( 4 ) 1 - 18 2021.2
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Properties and Classification of Diamond-Like Carbon Films Reviewed
Naoto Ohtake, Masanori Hiratsuka, Kazuhiro Kanda, Hiroki Akasaka, Masanori Tsujioka, Kenji Hirakuri, Atsushi Hirata, Tsuguyori Ohana, Hiroshi Inaba, Makoto Kano, Hidetoshi Saitoh
Materials 14 ( 2 ) 315 - 315 2021.1
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Deposition of High-Density Carbon Nanotube-Containing Nickel-Based Composite Films by Low-Pressure Cold Spray Reviewed
Jongbeom Choi, Wataru Nakayama, Nana Okimura, Yuki Hirata, Naoto Ohtake, Hiroki Akasaka
JOURNAL OF THERMAL SPRAY TECHNOLOGY 29 ( 8 ) 1902 - 1909 2020.12
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Metal Matrix Composites Using Diamond-like Carbon-Coated Particles Fabricated by Cold Spray Technique Reviewed
Nana Okimura, Jongbeom Choi, Wataru Nakayama, Nobuhisa Ata, Yuki Hirata, Naoto Ohtake, Hiroki Akasaka
JOURNAL OF THERMAL SPRAY TECHNOLOGY 29 ( 7 ) 1660 - 1668 2020.10
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Using Textured-DLC Coating to Improve the Wear Resistance of Stainless Steel Plate Under Dust-Containing Lubricant Condition Reviewed
Takuya Osawa, Makoto Matsuo, Yuya Eyama, Hiroshi Yamamoto, Shinji Tanaka, Masao Kikuchi, Yuki Hirata, Hiroki Akasaka, Naoto Ohtake
INTERNATIONAL JOURNAL OF AUTOMATION TECHNOLOGY 14 ( 1 ) 99 - 108 2020.1
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Thermal decomposition and structural variation by heating on hydrogenated amorphous carbon films Reviewed
Hiroki Akasaka, Sarayut Tunme, Ukit Rittihong, Masashi Tomidokoro, Chanan Euaruksakul, Souta Norizuki, Ratchadaporn Supruangnet, Hideki Nakajima, Yuki Hirata, Naoto Ohtake
DIAMOND AND RELATED MATERIALS 101 2020.1
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Preparation of DLC films on inner surfaces of metal tubes by nanopulse plasma CVD Reviewed
Yoshinao Iwamoto, Keitaro Takenami, Ryota Takamura, Masaki Inoue, Yuki Hirara, Hiroki Akasaka, Naoto Ohtake
Surface and Coatings Technology 380 125062 - 125062 2019.12
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Erosion of fluorinated diamond-like carbon films by exposure to soft X-rays Reviewed
Kazuhiro Kanda, Hiroki Takamatsu, Eri Miura-Fujiwara, Hiroki Akasaka, Akihiro Saiga, Koji Tamada
Japanese Journal of Applied Physics 57 ( 4 ) 2018.4
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Soft X-ray irradiation effect on the fluorinated DLC film Reviewed
Hiroki Takamatsu, Masahito Niibe, XiaoLong Zhou, Keiji Komatsu, Hidetoshi Saitoh, Hiroki Akasaka, Akihiro Saiga, Koji Tamada, Masahito Tagawa, Kumiko Yokota, Yuichi Furuyama, Kazuhiro Kanda
Diamond and Related Materials 79 14 - 20 2017.10
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Polyethylene-Carbon Nanotube Composite Film Deposited by Cold Spray Technique Reviewed
Nobuhisa Ata, Naoto Ohtake, Hiroki Akasaka
JOURNAL OF THERMAL SPRAY TECHNOLOGY 26 ( 7 ) 1541 - 1547 2017.10
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Grinding properties of diamond reinforced copper composite film deposited by cold spray technique
Okimura Nana, Ata Nobuhisa, Ohtani Ryota, Uetsuka Hiroshi, Ohtake Naoto, Akasaka Hiroki
JSAP Annual Meetings Extended Abstracts 2017.2 1338 - 1338 2017.8
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Modification process of fluorinated DLC film by the irradiation of soft X-rays
Kanda Kazuhiro, Takamatsu Hiroki, Miura-Fujisawa Eri, Akasaka Hiroki, Saiga Akihiro, Tamada Koji
JSAP Annual Meetings Extended Abstracts 2017.2 1342 - 1342 2017.8
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Deposition of boron doped DLC films on TiNb and characterization of their mechanical properties and blood compatibility Reviewed
Shahira Liza, Junko Hieda, Hiroki Akasaka, Naoto Ohtake, Yusuke Tsutsumi, Akiko Nagai, Takao Hanawa
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 18 ( 1 ) 76 - 87 2017
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Evaluation of chemical resistance on diamond-like carbon and related films
Akasaka Hiroki, Suzuki Tsuneo, Nakano Masayuki, Kanda Kazuhiro, Ohtake Naoto
JSAP Annual Meetings Extended Abstracts 2016.2 90 - 90 2016.9
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Changes of chemical structure of hydrogenated amorphous silicon Carbide films with the application of radio-frequency bias voltages during chemical vapor deposition Reviewed
Haruhiko Ito, Takeshi Ogaki, Motoki Kumakura, Shunsuke Saeki, Tsuneo Suzuki, Hiroki Akasaka, idetoshi Saitoh
Diamond and Related Materials 66 ( 1 ) 1 - 9 2016.6
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Structure and physical properties of stable isotopic amorphous carbon films Reviewed
Yutaro Suzuki, Yasuyoshi Kurokawa, Tsuneo Suzuki, Kazuhiro Kanda, Masahito Niibe, Masayuki Nakano, Naoto Ohtake, Hiroki Akasaka
DIAMOND AND RELATED MATERIALS 63 ( 0 ) 115 - 119 2016.3
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Effects of Combustion Gas Species on Y2O3 Film Produced from EDTA·Y·H Complex by Flame-Spraying Technique Reviewed
Keiji Komatsu, Tetsuo Sekiya, Yasuhiro Hasebe, Ayumu Toyama, Atsushi Nakamura, Masahiro Noguchi, Yu Li, Shigeo Ohshio, Hiroki Akasaka, Hidetoshi Saitoh
MRS Advances 1 ( 17 ) 1209 - 1214 2016
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Mechanical characterization of segment-structured hydrogen-free a-C films fabricated by filtered cathodic vacuum arc method Reviewed
Shota Kondo, Shahira Liza, Naoto Ohtake, Hiroki Akasaka, Makoto Matsuo, Yoshinao Iwamoto
SURFACE & COATINGS TECHNOLOGY 278 71 - 79 2015.9
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Dependence of ion concentration in simulated body fluid on apatite precipitation on titania surface Reviewed
Akira Sakaguchi, Masayuki Nakano, Junko Hieda, Naoto Ohtake, Hiroki Akasaka
APPLIED SURFACE SCIENCE 347 610 - 618 2015.8
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Tribological and thermal stability study of nanoporous amorphous boron carbide films prepared by pulsed plasma chemical vapor deposition Reviewed
Shahira Liza, Naoto Ohtake, Hiroki Akasaka, Juan M. Munoz-Guijosa
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 16 ( 3 ) 2015.6
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Effect of stable isotopes on electronic properties of amorphous carbon film
Suzuki Yutaro, Suzuki Tsuneo, Kanda Kazuhiro, Ohtake Naoto, Akasaka Hiroki
JSAP Annual Meetings Extended Abstracts 2015.1 1218 - 1218 2015.2
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Structural dependence of corrosion resistance of amorphous carbon films against nitric acid Reviewed
Atsuyuki Takarada, Tsuneo Suzuki, Kazuhiro Kanda, Masahito Niibe, Masayuki Nakano, Naoto Ohtake, Hiroki Akasaka
DIAMOND AND RELATED MATERIALS 51 ( ? ) 49 - 54 2015.1
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Titanium carbide/carbon nanocomposite hard coatings: A comparative study between various chemical analysis tools Reviewed International coauthorship International journal
A. A. El Mel, E. Gautron, F. Christien, B. Angleraud, A. Granier, P. Soucek, P. Vasina, V. Bursikova, M. Takashima, N. Ohtake, H. Akasaka, T. Suzuki, P. Y. Tessier
SURFACE & COATINGS TECHNOLOGY 256 41 - 46 2014.10
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13C and Deuterium isotopic effect on amorphous carbon film properties
Suzuki Yutaro, Suzuki Tsuneo, Kanda Kazuhiro, Ohtake Naoto, Akasaka Hiroki
JSAP Annual Meetings Extended Abstracts 2014.2 1164 - 1164 2014.9
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Carbon nanotube dispersed conductive network for microbial fuel cells Reviewed
S. Matsumoto, K. Yamanaka, H. Ogikubo, H. Akasaka, N. Ohtake
APPLIED PHYSICS LETTERS 105 ( 8 ) 083904 (4pages) 2014.8
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Deposition of Metal Oxide Films from Metal-EDTA Complexes by Flame Spray Technique Reviewed
Keiji Komatsu, Tetsuo Sekiya, Ayumu Toyama, Yasuhiro Hasebe, Atsushi Nakamura, Masahiro Noguchi, Yu Li, Shigeo Ohshio, Hiroki Akasaka, Hiroyuki Muramatsu, Hidetoshi Saitoh
JOURNAL OF THERMAL SPRAY TECHNOLOGY 23 ( 5 ) 833 - 838 2014.6
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Synthesis of Metal Oxide Particles Using Reaction Route from Rare-Earth Metal-EDTA Complexes Reviewed
Keiji Komatsu, Takaaki Tsuchiya, Yasuhiro Hasebe, Tetsuo Sekiya, Ayumu Toyama, Atsushi Nakamura, Hiroki Akasaka, Hidetoshi Saitoh
JOURNAL OF THERMAL SPRAY TECHNOLOGY 23 ( 5 ) 885 - 889 2014.6
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Synthesis of a Violet Sr-Al-O: Eu 2+Phosphor Particle Using Elemental Al Diffusion Reviewed
Keiji Komatsu, Shinya Tsuchida, Hayato Maruyama, Shigeo Ohshio, Hiroki Akasaka, Hidetoshi Saitoh, Atsushi Nakamura
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY 11 ( 3 ) 594 - 601 2014.5
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Preparation and mechanical characterization of amorphous B-C films Reviewed
Shahira Liza, Hiroki Akasaka, Masayuki Nakano, Naoto Ohtake
Advanced Materials Research 970 124 - 127 2014
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Synthesis of Antimony Doped Amorphous Carbon Films Reviewed International journal
H. Okuyama, M. Takashima, H. Akasaka, N. Ohtake
11TH APCPST (ASIA PACIFIC CONFERENCE ON PLASMA SCIENCE AND TECHNOLOGY) AND 25TH SPSM (SYMPOSIUM ON PLASMA SCIENCE FOR MATERIALS) 441 12036 - 012036-5 2013.6
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同位体原料からのアモルファス炭素膜の作製
鈴木 裕太郎, 鈴木 常生, 大竹 尚登, 赤坂 大樹
応用物理学会学術講演会講演予稿集 2013.1 1213 - 1213 2013.3
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Structured MgO film coated electrodes for glow discharge sustainment Reviewed
Hiroki Akasaka, Kuniyuki Matsuda, Ryohei Minami, Toshio Kiyokawa, Akihiro Takano, Shigeo Ohshio, Ikumi Toda, Hidetoshi Saitoh
Thin Solid Films 534 ( 1 ) 465 - 469 2013.3
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823 Influence of carbon and hydrogen isotope on amorphous carbon film properties
SUZUKI Yutaro, SUZUKI Tsuneo, KANDA Kazuhiro, OHTAKE Naoto, AKASAKA Hiroki
The Proceedings of the Materials and processing conference 2013.21 _823-1_ - _823-3_ 2013
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Fibrinogen and lysozyme adsorption on amorphous carbon film surface detected by multilayer device from the back side of the film Reviewed
Hiroki Akasaka, Aoi Takeda, Tsuneo Suzuki, Masayuki Nakano, Shigeo Ohshio, Hidetoshi Saitoh
Diamond and Related Materials 20 ( 2 ) 213 - 216 2011.4
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Investigation of temperature dependence on emission properties of Sr-Al-O:Eu2+ phosphor synthesized using elemental diffusion from substrate Reviewed
Keiji Komatsu, Atsushi Nakamura, Ariyuki Kato, Shigeo Ohshio, Hiroki Akasaka, Hidetoshi Saitoh
IOP Conference Series: Materials Science and Engineering 18 ( SYMPOSIUM 7 ) 102017 - 102017 2011
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Evaluation of protein adsorption on hydrogenated amorphous carbon films by surface plasmon resonance phenomenon Reviewed
Hiroki Akasaka, Naoki Gawazawa, Tsuneo Suzuki, Masayuki Nakano, Shigeo Ohshio, Hidetoshi Saitoh
Diamond and Related Materials 19 ( 10 ) 1235 - 1239 2010.10
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Shinji Fujimoto, Hiroki Akasaka, Tsuneo Suzuki, Naoto Ohtake, Osamu Takai
JAPANESE JOURNAL OF APPLIED PHYSICS 49 ( 7 ) 075501-1 - 075501-9 2010
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Reflectivity and polarization sensitivity of a bent crystal with DLC deposition Reviewed
Ryo Iizuka, Shingo Kusunoki, Atsushi Tokuno, Yohko Tsuboi, Seiya Takeda, Satoshi Yamamuro, Kazuyoshi Misumi, Hiroki Akasaka, Naoto Ohtake, Masanori Saito
SPACE TELESCOPES AND INSTRUMENTATION 2010: ULTRAVIOLET TO GAMMA RAY 7732 2010
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Investigation of temperature dependence on emission properties of Sr-Al-O:Eu2+ phosphor synthesized on MgO single crystal substrate
Komatsu Keiji, Nakamura Atsushi, Kato Ariyuki, Ohshio Shigeo, Akasaka Hiroki, Saitoh Hidetoshi
Preprints of Annual Meeting of The Ceramic Society of Japan<br> Preprints of Fall Meeting of The Ceramic Society of Japan 2010S 2H07 - 2H07 2010
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Effect of Substrates on Film Hardness Measurements of Nanometer Thick Amorphous Carbon Films Reviewed
AKASAKA Hiroki, ITO Hiroki, NAKANO Masayuki, OHSHIO Shigeo, SAITOH Hidetoshi
Journal of Solid Mechanics and Materials Engineering 3 ( 12 ) 1233 - 1237 2009.12
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Akasaka Hiroki, Yamada Takatoshi, Ohtake Naoto
Diamond and Related Materials 18 ( 2-3 ) 423 - 425 2009
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Electric properties of a-C : H/a-C : N : H/aluminum structure
Hiroki Akasaka, Naoto Ohtake
DIAMOND AND RELATED MATERIALS 17 ( 4-5 ) 673 - 675 2008.4
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Hiroki Akasaka, Koji Inazu, Naoto Ohtake
JAPANESE JOURNAL OF APPLIED PHYSICS 47 ( 3 ) 1694 - 1698 2008.3
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Fabrication and properties of a-C : H/boron-doped diamond structure
Hiroki Akasaka, Takahiro Imai, Naoto Ohtake
NEW DIAMOND AND FRONTIER CARBON TECHNOLOGY 17 ( 6 ) 301 - 308 2007
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Electrical properties of <l>a</l>–C:H films grown by RF plasma CVD
Nishi Hidetaka, Akasaka Hiroki, Ohtake Naoto
Proceedings of JSPE Semestrial Meeting 2006S 641 - 642 2006
MISC
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Structural analysis of Zn-eluting Zn-DLC film
神田一浩, 中西康次, 鈴木常生, 赤坂大樹, 大越康晴, 平塚傑工, 平栗健二
応用物理学会秋季学術講演会講演予稿集(CD-ROM) 85th 2024
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Joining of diamond-like carbon films by laser irradiation in the atmosphere
長谷嘉琉, 原田大, 青野祐子, 平田祐樹, 大竹尚登, 赤坂大樹
精密工学会大会学術講演会講演論文集(CD-ROM) 2024 2024
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Laser joining of amorphous carbon films with varying light absorption properties
長谷嘉琉, 原田大, 青野祐子, 平田祐樹, 大竹尚登, 赤坂大樹
応用物理学会春季学術講演会講演予稿集(CD-ROM) 71st 2024
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Structural change of hydrogenated amorphous carbon films by laser joining
長谷嘉琉, SARAYUT Tunmee, 青野祐子, UKIT Rittihong, 平田祐樹, 大竹尚登, 赤坂大樹
応用物理学会秋季学術講演会講演予稿集(CD-ROM) 85th 2024
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Orientation change of sp2 bonded carbon in amorphous carbon films by laser irradiation
馬田直樹, 青野祐子, 新部正人, 新部正人, 神田一浩, 平田祐樹, 大竹尚登, 赤坂大樹
応用物理学会秋季学術講演会講演予稿集(CD-ROM) 84th 2023
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Joining amorphous carbon films by pulsed laser irradiation
長谷嘉琉, 原田大, 青野祐子, 平田祐樹, 大竹尚登, 赤坂大樹
応用物理学会秋季学術講演会講演予稿集(CD-ROM) 84th 2023
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Shape changes in amorphous carbon films by laser irradiation
原田大, TUNMEE Sarayut, 青野祐子, EUARUKSAKUN Chanan, RITTIHONGT Ukit, 平田祐樹, 大竹尚登, 赤坂大樹
応用物理学会秋季学術講演会講演予稿集(CD-ROM) 83rd 2022
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Structural control and sliding characteristics of amorphous carbon films by laser irradiation
原田大, TUNMEE Sarayut, 青野祐子, EUARUKSAKUN Chanan, RITTIHONG Ukit, 平田祐樹, 大竹尚登, 赤坂大樹
応用物理学会春季学術講演会講演予稿集(CD-ROM) 69th 2022
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Precision Coating of ta-C Films on Quartz Surfaces
Naoto Ohtake, Yuki Hirata, Hiroki Akasaka, Kotaro Kawai
JSME 2020 Conference on Leading Edge Manufacturing/Materials and Processing 2020.9
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Effect of Si incorporation on corrosion resistance of hydrogenated amorphous carbon film Reviewed
Jumpei Nishikawa, Naoki Sugihara, Masayuki Nakano, Junko Hieda, Naoto Ohtake, Hiroki Akasaka
Diamond & Related Materials 90 207–213 2018.11
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Isotopic influence on amorphous carbon films
Suzuki Yutaro, Fuji Ryo, Ohtake Naoto, Akasaka Hiroki
Transactions of the Materials Research Society of Japan 40 ( 4 ) 379 - 382 2015
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Haruhiko Ito, Katsuaki Koshimura, Saori Onitsuka, Kohtaro Okada, Tsuneo Suzuki, Hiroki Akasaka, Hidetoshi Saitoh
Plasma Chemistry and Plasma Processing 32 231 - 248 2012.4
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Detection of Human Serum Albumin Adsorption on Titania Surface Using Surface Plasmon Resonance Under Various pH
Hidetoshi Saitoh, Hiroki Akasaka, Shigeo Ohshio, Kiyoto
IOP Conference Series: Materials Science and Engineering 18 022016 2011.3
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49 ( 12 ) 2010.12
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Detection of protein adsorption on silica surface using surface plasmon resonance sensor
47 ( 10 ) 8106 - 8108 2008.10
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Deposition of Cubic Boron Nitride in a Supersonic Plasma Jet Reactor with Secondary Discharge
Jami McLaren, Hiroki Akasaka, Joachim Heberlein
Plasma Processes and Polymers 4 ( S1 ) S166 - S170 2007.4
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Preparation of needle-like structured amorphous carbon films and their field emission properties
Hiroki Akasaka, Kei Iwashige, Takao Saito, Xudong Yang, Akimitsu Hatta, Naoto Ohtake
NEW DIAMOND AND FRONTIER CARBON TECHNOLOGY 16 ( 4 ) 221 - 232 2006
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RFプラズマCVD法によるアモルファス炭素膜の電気的特性評価
西英隆, 赤坂大樹, 大竹尚登
精密工学会大会学術講演会講演論文集 2006 2006
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Characterization of amorphous carbon films deposited by surface wave plasma CVD
Hiroki Akasaka, Naoto Ohtake
Diamond and Related Materials 14 ( 11-12 ) 1828 - 1831 2005.11
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Characterization of amorphous carbon films deposited by surface wave plasma CVD
H Akasaka, N Ohtake
DIAMOND AND RELATED MATERIALS 14 ( 11-12 ) 1828 - 1831 2005.11
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Photovoltaic characteristics of a-C : H films prepared on p-Si by plasma CVD
H Akasaka, Y Aoki, N Ohtake
NEW DIAMOND AND FRONTIER CARBON TECHNOLOGY 15 ( 3 ) 151 - 157 2005
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Photovoltaic characteristics of a-C : H films prepared on p-Si by plasma CVD
H Akasaka, Y Aoki, N Ohtake
NEW DIAMOND AND FRONTIER CARBON TECHNOLOGY 15 ( 3 ) 151 - 157 2005
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高周波プラズマCVD法により作製されたドープトアモルファス炭素膜の特性評価
西英隆, 赤坂大樹, 大竹尚登
ダイヤモンドシンポジウム講演要旨集 19th 2005
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Roles of ions and free electrons in the synthesis of mechanically hard amorphous-CNx films using a dissociative excitation reaction of BrCN with the Ar electron cyclotron resonance plasma
KC Namiki, H Akasaka, H Saitoh, H Ito
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS 42 ( 6A ) 3682 - 3683 2003.6
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Raman scattering spectroscopy of structure of amorphous carbon nitride films
Y Ohkawara, H Akasaka, KC Namiki, S Ohshio, H Ito, H Saitoh
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS 42 ( 1 ) 254 - 258 2003.1
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Work function of amorphous carbon nitride with various functional groups
H Saitoh, H Akasaka, T Washio, Y Ohkawara, S Ohshio, H Ito
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS 41 ( 10 ) 6169 - 6173 2002.10
Research Projects
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Systematization of Adamant Thin Films and Fabrication of High-Functional Mechanical Coatings
Grant number：16H02406 2016.4 - 2020.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)
Ohtake Naoto
Grant amount：\43810000 （ Direct Cost: \33700000 、 Indirect Cost：\10110000 ）
This research aims to develop novel mechanical coating materials consisting of carbon, boron and nitrogen, which is named “adamant” thin film coatings. Ternary diagram was described using measured data set of mechanical properties of various adamant films, and systematization of adamant films is performed on the diagram.
Carbon contents has significant influence for the mechanical properties of adamant films. Nanoindentation hardness of the film sharply decreased when the carbon content exceeds 50at.%. In contrast, the thermal resistivity of the film was improved by decreasing the carbon content. It is interesting result that the wear resistance improves when small amount of B was added in DLC film. Moreover, adhesion of platelet was suppressed on the B containing amorphous carbon films. These results lead us to open novel mechanical coatings using adamant materials.