Organization
School of Science Visiting Associate Professor (Lecturer)
Title
Visiting Associate Professor (Lecturer)
External link
Degree
-
Ph.D. in Science ( 2011.3 Tohoku University )
Research Interests
-
Chemical reaction dynamics
-
Molecular spectroscopy
-
Cluster chemistry
-
Femtochemistry
-
Physical Chemistry
-
wave function imaging
-
Molecular movie
Research Areas
-
Nanotechnology/Materials / Fundamental physical chemistry
Education
-
Tohoku Univ. Graduate School of Science Department of Chemistry
2008.4 - 2011.3
-
Tohoku Univ. Graduate School of Science Department of Chemistry
2006.4 - 2008.3
-
Tohoku University Facaulty of Science Department of Chemistry
2002.4 - 2006.3
-
新潟県立長岡高等学校 理数科
1999.4 - 2002.3
Research History
-
Kitasato University School of Science Associate Professor
2025.4
-
Tokyo Institute of Technology School of Science Visiting Lecturer/Associate Professor
2020.9
-
Kitasato University Department of Chemistry Junior Associate Professor
2020.9 - 2025.3
Country：Japan
-
Tokyo Institute of Technology Department of Chemistry Assistant Professor
2015.3 - 2020.8
-
Institute for Molecular Science Assistant Professor
2011.4 - 2015.2
-
JSPS
2008.4 - 2011.3
Professional Memberships
-
JAPAN SOCIETY FOR MOLECULAR SCIENCE
-
日本光学会
-
THE LASER SOCIETY OF JAPAN
-
THE SPECTROSCOPICAL SOCIETY OF JAPAN
-
THE CHEMICAL SOCIETY OF JAPAN
Committee Memberships
-
日本分光学会 企画委員
2022.7
-
日本分光学会 「分光研究」編集委員
2022.4
Committee type：Academic society
-
分子科学研究所装置開発室 運営委員会所外委員
2021.4 - 2025.3
-
日本光学会 光科学および光技術調査委員会(関東)委員
2021.4 - 2023.3
-
文部科学省 科学技術政策研究所 専門調査員
2020.4
Committee type：Government
-
日本分光学会先端レーザー分光部会 コアメンバー
2016.4
Committee type：Academic society
-
光科学異分野横断萌芽研究会 化学系組織委員
2015.4 - 2018.3
Committee type：Academic society
Papers
-
Rotational spectroscopy of the argon dimer by time-resolved Coulomb explosion imaging of rotational wave packets Reviewed
Mizuse, Kenta, Sato, Urara, Tobata, Yuya, Ohshima, Yasuhiro
Physical Chemistry Chemical Physics 24 ( 18 ) 11014 - 11022 2022.5
-
Space-slice ion imaging: High slice resolution imaging in the polarization plane of arbitrarily polarized ionizing light Reviewed
Kenta Mizuse, Romu Fujimoto, Yasuhiro Ohshima
REVIEW OF SCIENTIFIC INSTRUMENTS 90 ( 10 ) 2019.10
-
Quantum unidirectional rotation directly imaged with molecules Reviewed
Kenta Mizuse, Kenta Kitano, Hirokazu Hasegawa, Yasuhiro Ohshima
SCIENCE ADVANCES 1 ( 6 ) 2015.7
-
Structural Origin of the Antimagic Number in Protonated Water Clusters H+(H2O)(n): Spectroscopic Observation of the "Missing" Water Molecule in the Outermost Hydration Shell Reviewed
Kenta Mizuse, Asuka Fuji
JOURNAL OF PHYSICAL CHEMISTRY LETTERS 2 ( 17 ) 2130 - 2134 2011.9
-
Structural trends of ionized water networks: Infrared spectroscopy of water cluster radical cations (H2O)(n)(+) (n=3-11) Reviewed
Kenta Mizuse, Jer-Lai Kuo, Asuka Fujii
CHEMICAL SCIENCE 2 ( 5 ) 868 - 876 2011
-
Infrared Spectra and Hydrogen-Bonded Network Structures of Large Protonated Water Clusters H+(H2O)(n) (n=20-200) Reviewed
Kenta Mizuse, Naohiko Mikami, Asuka Fujii
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 49 ( 52 ) 10119 - 10122 2010
-
Observation of the Charge Resonance Band of Hemibonded (H 2 O) 2 + in the Gas Phase Reviewed
Mizuhiro Kominato, Tatsuki Hosoda, Kenta Mizuse, Susumu Kuma, Andrey F. Vilesov, Asuka Fujii
The Journal of Physical Chemistry Letters 17 ( 26 ) 7322 - 7327 2026.6
-
Infrared Spectroscopy of Radical-Cation Clusters (NH 3 ) n =4–6 + Reviewed
Amandeep Singh, Arisa Iguchi, Zane Golpariani, Tom C. Bernaards, Asuka Fujii, Hajime Tanuma, Toshiyuki Azuma, Kenta Mizuse, Susumu Kuma, Andrey F. Vilesov
The Journal of Physical Chemistry A 129 ( 42 ) 9721 - 9732 2025.10
-
Infrared Spectroscopy of Radical Cation Clusters (NH3)2+ and (NH3)3+ Reviewed
Amandeep Singh, Arisa Iguchi, Tom C. Bernaards, Zane Golpariani, Kenta Mizuse, Asuka Fujii, Hajime Tanuma, Toshiyuki Azuma, Susumu Kuma, Andrey Vilesov
The Journal of Physical Chemistry A 129 ( 10 ) 2472 - 2481 2025.2
-
Arisa Iguchi, Amandeep Singh, Stefan Bergmeister, Andrew A. Azhagesan, Kenta Mizuse, Asuka Fujii, Hajime Tanuma, Toshiyuki Azuma, Paul Scheier, Susumu Kuma, Andrey F. Vilesov
The Journal of Physical Chemistry Letters 8199 - 8204 2023.9
-
Torsional Wave-Packet Dynamics in 2-Fluorobiphenyl Investigated by State-Selective Ionization-Detected Impulsive Stimulated Raman Spectroscopy Invited Reviewed
Makoto Nikaido, Kenta Mizuse, Yasuhiro Ohshima
The Journal of Physical Chemistry A 127 ( 23 ) 4964 - 4978 2023.5
-
Time-Domain Rotational Raman Spectroscopy of the Ethylene Dimer and Trimer by Coulomb Explosion Imaging of Rotational Wave Packets Invited Reviewed
Kenta Mizuse, Koyomi Takano, Eri Kakizaki, Yuya Tobata, Yasuhiro Ohshima
The Journal of Physical Chemistry A 127 ( 22 ) 4848 - 4855 2023.5
-
Direct imaging of the hyperfine depolarization in electronically excited NO molecules Reviewed
Dai Ikeda, Kenta Mizuse, Yasuhiro Ohshima
Physical Review A 107 ( 4 ) 043116 2023.4
-
Rotational wave-packet imaging spectroscopy of the ethylene dimer Reviewed
Yasuhiro Ohshima, Yuya Tobata, Kenta Mizuse
Chemical Physics Letters 803 139850 - 139850 2022.9
-
Quantum-state reconstruction of unidirectional molecular rotations Reviewed
Kazuki Ueno, Kenta Mizuse, Yasuhiro Ohshima
Physical Review A 103 ( 5 ) 053104 2021.5
-
Direct imaging of direction-controlled molecular rotational wave packets created by a polarization-skewed double-pulse Invited Reviewed
Kenta Mizuse, Naoya Sakamoto, Romu Fujimoto, Yasuhiro Ohshima
PHYSICAL CHEMISTRY CHEMICAL PHYSICS 22 ( 19 ) 10853 - 10862 2020.5
-
Acceleration and Deceleration of Unidirectional Molecular Rotation by a Femtosecond Laser Pulse Reviewed
Kenta Mizuse, Romu Fujimoto, Yasuhiro Ohshima
CHEMISTRY LETTERS 48 ( 11 ) 1371 - 1374 2019.11
-
Visualizing rotational wave functions of electronically excited nitric oxide molecules by using an ion imaging technique Reviewed
Kenta Mizuse, Nao Chizuwa, Dai Ikeda, Takashi Imajo, Yasuhiro Ohshima
Physical Chemistry Chemical Physics 20 ( 5 ) 3303 - 3309 2018.2
-
Direct Imaging of Laser-driven Ultrafast Molecular Rotation Reviewed
Kenta Mizuse, Romu Fujimoto, Nobuo Mizutani, Yasuhiro Ohshima
JOVE-JOURNAL OF VISUALIZED EXPERIMENTS ( 120 ) 2017.2
-
Hydrogen-bonded ring closing and opening of protonated methanol clusters H+(CH3OH)(n) (n=4-8) with the inert gas tagging Reviewed
Ying-Cheng Li, Toru Hamashima, Ryoko Yamazaki, Tomohiro Kobayashi, Yuta Suzuki, Kenta Mizuse, Asuka Fujii, Jer-Lai Kuo
PHYSICAL CHEMISTRY CHEMICAL PHYSICS 17 ( 34 ) 22042 - 22053 2015
-
Infrared spectroscopic studies on hydrogen-bonded water networks in gas phase clusters Reviewed
Asuka Fujii, Kenta Mizuse
INTERNATIONAL REVIEWS IN PHYSICAL CHEMISTRY 32 ( 2 ) 266 - 307 2013.6
-
Characterization of a Solvent-Separated Ion-Radical Pair in Cationized Water Networks: Infrared Photodissociation and Ar-Attachment Experiments for Water Cluster Radical Cations (H2O)(n)(+) (n=3-8) Reviewed
Kenta Mizuse, Asuka Fujii
JOURNAL OF PHYSICAL CHEMISTRY A 117 ( 5 ) 929 - 938 2013.2
-
Folding of the Hydrogen Bond Network of H+(CH3OH)(7) with Rare Gas Tagging Reviewed
Toru Hamashima, Ying-Cheng Li, Michael C. H. Wu, Kenta Mizuse, Tomohiro Kobayashi, Asuka Fujii, Jer-Lai Kuo
JOURNAL OF PHYSICAL CHEMISTRY A 117 ( 1 ) 101 - 107 2013.1
-
Infrared spectroscopy of large protonated water clusters H +(H2O)20-50 cooled by inert gas attachment Reviewed
Kenta Mizuse, Asuka Fujii
Chemical Physics 419 2 - 7 2013
-
Structures of hydrogen bond networks formed by a few tens of methanol molecules in the gas phase: size-selective infrared spectroscopy of neutral and protonated methanol clusters Reviewed
Tomohiro Kobayashi, Ryunosuke Shishido, Kenta Mizuse, Asuka Fujii, Jer-Lai Kuo
PHYSICAL CHEMISTRY CHEMICAL PHYSICS 15 ( 24 ) 9523 - 9530 2013
-
Tuning of the Internal Energy and Isomer Distribution in Small Protonated Water Clusters H+(H2O)(4-8): An Application of the Inert Gas Messenger Technique Reviewed
Kenta Mizuse, Asuka Fujii
JOURNAL OF PHYSICAL CHEMISTRY A 116 ( 20 ) 4868 - 4877 2012.5
-
Solvation-Induced sigma-Complex Structure Formation in the Gas Phase: A Revisit to the Infrared Spectroscopy of [C6H6-(CH3OH)(2)](+) Reviewed
Kenta Mizuse, Yuta Suzuki, Naohiko Mikami, Asuka Fujii
JOURNAL OF PHYSICAL CHEMISTRY A 115 ( 41 ) 11156 - 11161 2011.10
-
Spectral Signatures of Four-Coordinated Sites in Water Clusters: Infrared Spectroscopy of Phenol-(H2O)(n) (similar to 20 <= n <= similar to 50) Reviewed
Toru Hamashima, Kenta Mizuse, Asuka Fujii
JOURNAL OF PHYSICAL CHEMISTRY A 115 ( 5 ) 620 - 625 2011.2
-
Infrared photodissociation spectroscopy of H+(H2O)(6)center dot M-m (M = Ne, Ar, Kr, Xe, H-2, N-2, and CH4): messenger-dependent balance between H3O+ and H5O2+ core isomers Reviewed
Kenta Mizuse, Asuka Fujii
PHYSICAL CHEMISTRY CHEMICAL PHYSICS 13 ( 15 ) 7129 - 7135 2011
-
Infrared and Electronic Spectroscopy of Benzene-Ammonia Cluster Radical Cations [C6H6(NH3)(1,2)](+): Observation of Isolated and Microsolvated sigma-Complexes Reviewed
Kenta Mizuse, Hayato Hasegawa, Naohiko Mikami, Asuka Fujii
JOURNAL OF PHYSICAL CHEMISTRY A 114 ( 42 ) 11060 - 11069 2010.10
-
Infrared Spectroscopy of Phenol-(H2O)(n > 10): Structural Strains in Hydrogen Bond Networks of Neutral Water Clusters Reviewed
Kenta Mizuse, Toru Hamashima, Asuka Fujii
JOURNAL OF PHYSICAL CHEMISTRY A 113 ( 44 ) 12134 - 12141 2009.11
-
Observation of an isolated intermediate of the nucleophilic aromatic substition reaction by infrared spectroscopy Reviewed
Hayato Hasegawa, Kenta Mizuse, Masaki Hachiya, Yoshiyuki Matsuda, Naohiko Mikami, Asuka Fujii
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 47 ( 32 ) 6008 - 6010 2008
-
Long range influence of an excess proton on the architecture of the hydrogen bond network in large-sized water clusters Reviewed
Kenta Mizuse, Asuka Fujii, Naohiko Mikami
JOURNAL OF CHEMICAL PHYSICS 126 ( 23 ) 2007.6
-
Compatibility between methanol and water in the three-dimensional cage formation of large-sized protonated methanol-water mixed clusters Reviewed
Ken-ichiro Suhara, Asuka Fujii, Kenta Mizuse, Naohiko Mikami, Jer-Lai Kuo
JOURNAL OF CHEMICAL PHYSICS 126 ( 19 ) 2007.5
-
Infrared and electronic spectroscopy of a model system for the nucleophilic substitution intermediate in the gas phase: The C-N valence bond formation in the benzene-ammonia cluster cation Reviewed
K Mizuse, A Fujii, N Mikami
JOURNAL OF PHYSICAL CHEMISTRY A 110 ( 20 ) 6387 - 6390 2006.5
Books
-
Spectroscopic Investigations of Hydrogen Bond Network Structures in Water Clusters
Kenta Mizuse（ Role： Sole author）
Springer 2013 （ ISBN:9784431543114 ）
MISC
-
High-Resolution Spectroscopy Based on Real-Time Imaging of Molecular Motions Invited Reviewed
Kenta MIzuse
Journal of the Spectroscopical Society of Japan 72 ( 6 ) 214 - 214 2023.12
-
High-precision Spatiotemporal Imaging of Molecular Rotational Wave Packets Invited Reviewed
Kenta Mizuse
Molecular Science 13 ( 1 ) A0104 - A0104 2019.9
-
普及型3Dプリンターを用いた光学マウントの作製とその性能評価 Invited Reviewed
水瀬賢太, 上野一樹, 大島康裕
分光研究 66 ( 2 ) 54 - 57 2017.2
-
Spectroscopy of Cluster Ions : Insights into Complicated Molecular Systems from Gas-phase Studies Reviewed
61 ( 4 ) 148 - 158 2012.4
-
時間領域ラマン分光の超高分解能化 Invited Reviewed
水瀬賢太
分光研究 71 ( 1 ) 25 - 26 2022.2
-
光を用いたキラル分子の空間分離に向けて Invited
水瀬賢太
化学 75 ( 2 ) 61 - 62 2020.2
Awards
-
日本分光学会奨励賞
2022.10 日本分光学会 分子振動・回転波束ダイナミクスの高精度イメージングと分光応用
水瀬賢太
-
第11回分子科学会奨励賞
2018.9 分子科学会 高精度核波束イメージングによる気相分子および分子クラスターの構造とダイナミクスの研究
水瀬 賢太
-
PCCP prize
2017.3 The Royal Society of Chemistry and The Chemical Society of Japan Direct imaging study of gas-phase ultrafast molecular dynamics using a newly developed space-slice ion imaging technique
KENTA Mizuse
-
konica minolta science and technology foundation award
2016.2 konica minolta science and technology foundation
KENTA Mizuse
Research Projects
-
全自由度量子化学と光コム精密分子分光で解き明かす核の量子効果
Grant number：25H01271 2025.4 - 2030.3
日本学術振興会 科学研究費助成事業 学術変革領域研究(A)
岩國 加奈, 立川 仁典, 兼松 佑典, 中島 正和, 久間 晋, 水瀬 賢太
Grant amount：\171340000 （ Direct Cost: \131800000 、 Indirect Cost：\39540000 ）
-
分子動画撮影に基づく波動関数分光法の開発と展開
Grant number：JPMJFR236P 2024.10 - 2028.3
科学技術振興機構（JST） 創発的研究支援事業（フェーズ１）
-
振動波束制御・イメージングを用いた分子間振動・大振幅振動ダイナミクスの研究
Grant number：24K08358 2024.4 - 2027.3
日本学術振興会 科学研究費助成事業 基盤研究(C)
水瀬 賢太
Authorship：Principal investigator
Grant amount：\4550000 （ Direct Cost: \3500000 、 Indirect Cost：\1050000 ）
-
分子動画撮影に基づく波動関数分光法の開発と展開
Grant number：24014539 2024 - 2031
科学技術振興機構 戦略的な研究開発の推進/創発的研究支援事業
水瀬 賢太
分子の運動を波動関数レベルで高精度動画観測することで、分子のどのような動き方がどのような周波数に対応するかを明らかにする、新しい分子分光法を開発・展開します。これにより、従来困難であったスペクトル情報の解釈について、実験的な帰属が与えられることになり、分光学に大きなインパクトを与えます。測定の広帯域化や多自由度系への適用に挑戦し、技術基盤としての確立を目指します。
-
新規高感度・高分解能分光による星間イオン種の構造と分子間相互作用の研究
Grant number：23H03994 2023.4 - 2025.3
日本学術振興会 科学研究費助成事業 学術変革領域研究(A) 学術変革領域研究(A)
水瀬 賢太
Authorship：Principal investigator
Grant amount：\5200000 （ Direct Cost: \4000000 、 Indirect Cost：\1200000 ）
-
Sculpturing quantum wave packets of large-amplitude molecular vibration: Design, control, and visualization of isomerization reactions
Grant number：22H00312 2022.4 - 2027.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)
Authorship：Coinvestigator(s)
Grant amount：\42380000 （ Direct Cost: \32600000 、 Indirect Cost：\9780000 ）
-
Development of broad bandwidth, high-resolution molecular spectroscopy for ionic species and its application to interstellar ion chemistry
Grant number：21H05434 2021.9 - 2023.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Transformative Research Areas (A)
Authorship：Principal investigator
Grant amount：\5200000 （ Direct Cost: \4000000 、 Indirect Cost：\1200000 ）
-
Ultrafast charged-particle imaging study of intermolecular charge transfer reactions using oriented molecular beams
Grant number：21K18938 2021.7 - 2023.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Research (Exploratory)
Grant amount：\6500000 （ Direct Cost: \5000000 、 Indirect Cost：\1500000 ）
-
Development of broad bandwidth, high-resolution molecular spectroscopy using vibrational and rotational wave packet imaging
Grant number：19K22164 2019.6 - 2021.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Research (Exploratory)
Mizuse Kenta
Authorship：Principal investigator
Grant amount：\6500000 （ Direct Cost: \5000000 、 Indirect Cost：\1500000 ）
In this study, I have developed a new broad bandwidth, high-resolution molecular spectroscopic technique. The present method relies on high-precision real-time imaging of molecular rotational and vibrational wave packet dynamics. High-resolution spectra can be obtained as Fourie transform of observed molecular movie. I have developed a new ion imaging apparatus for this purpose. I have applied our method to van der Waals molecular clusters, and succeeded in measuring high-resolution rotational and vibrational spectra for the first time.
-
Molcular dynamics studies by a newly developed photoelecton-photoion slice imaging apparatus
Grant number：16K13927 2016.4 - 2018.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research Grant-in-Aid for Challenging Exploratory Research
Mizuse Kenta
Authorship：Principal investigator
Grant amount：\3770000 （ Direct Cost: \2900000 、 Indirect Cost：\870000 ）
Charged-particle imaging for gas-phase molecular systems is one of the powerful tools to study molecular dynamics of interest. In a typical imaging method, however, there have been several dynamics which cannot be observed due to experimental limitations. In this study, to overcome difficulties in existing methods, we developed a new spatial slice imaging apparatus. In our method, only photoelectrons/ions in the polarization plane of laser pulses are directly selected by a mechanical slit and then imaged. We applied our method to laser-driven rotational wavepacket, and (the square of) rotational wavefunctions in electronic exited state molecules. In the observed image, wave, quantum nature of dynamics can be clearly seen. We believe our method opened a new way to probe the molecular dynamics.
-
Study of Intermolecular Dynamics on the Basis of Optical Control, Spectroscopy, and Direct Imaging of Molecular Clusters
Grant number：16H00826 2016.4 - 2018.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area) Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
Authorship：Principal investigator
Grant amount：\6760000 （ Direct Cost: \5200000 、 Indirect Cost：\1560000 ）
-
Intermolecular interaction landscape explored with coherent control
Grant number：15H03766 2015.4 - 2018.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B) Grant-in-Aid for Scientific Research (B)
Ohshima Yasuhiro
Grant amount：\17030000 （ Direct Cost: \13100000 、 Indirect Cost：\3930000 ）
We have developed a new experimental procedure, which combines the coherent control by ultrashort pulse excitation with the ion imaging method, and applied it to the study on creation and observation of intermolecular and rotational wave packets of nitrogen molecule dimer, of which little information has been reported so far. This achievement can be regarded as the establishment of a new measurement technology named “high-resolution spectroscopy in time-domain.” We have also determined the binding energies of several clusters composed with benzene and a few number of hydrogen (and deuterium) molecules by implementing mass-selected two-color two-photon ionization. This is the first experimental evaluation of the separation of the binding energies between two different spin isomers.
-
Optical control and real-time observation of hydrogen bonding dynamics in hydrated clusters
Grant number：26810011 2014.4 - 2016.3
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)
Mizuse Kenta
Grant amount：\3770000 （ Direct Cost: \2900000 、 Indirect Cost：\870000 ）
The purpose of this study is to understand the details of low frequency structural dynamic of molecular system via clear observations of intermolecular interaction dynamics. For this, we developed a method to selectively initiate such a low frequency dynamics and a new apparatus for real-time imaging of molecular cluster dynamics. With the use of our new approach, we succeeded in detecting ion images of molecular clusters and in tracking vibrational and rotational dynamics for the first time.
-
分子クラスターの振動コヒーレント制御による分子間相互作用ダイナミクスの研究
Grant number：26104539 2014.4 - 2016.3
日本学術振興会 科学研究費助成事業 新学術領域研究(研究領域提案型) 新学術領域研究(研究領域提案型)
水瀬 賢太
Grant amount：\6500000 （ Direct Cost: \5000000 、 Indirect Cost：\1500000 ）
１．超高速分子ダイナミクスの高解像度観測に向けた新規イメージング法の開発
気相分子系ダイナミクスの強力な可視化法である、荷電粒子イメージング法に対して、独自の視点に基づく観測原理を導入し、高分解能かつ高スループットの画像観測装置を設計・開発した。既存の2次元計測では、系に軸対称性がない場合の分布算出が不可能であった。本研究では、そのような困難を取り除くため、空間断層画像化法を組み込み、さらに精密スリットの製作によって分解能の向上を図った。
２．実時間イメージングを用いた分子クラスターの低振動ダイナミクス観測
新規イメージング法を分子クラスター種に適用することで、微弱なクラスター由来のイオン信号の検出に成功した。ダイナミクス研究については、地球大気で重要性が指摘されているにも関わらず研究例が少ない窒素多量体を対象とし、フェムト秒レーザー照射による、ラマン活性な低振動の回転、振動モードのコヒーレント励起を行った。誘起したダイナミクスをフェムト秒の時間分解能で画像観測することで、振動、回転周期の直接測定に成功した。得られた情報から、これまで測定困難だった双極子をもたない多量体の構造とダイナミクスの理解が可能となる。 -
Coherent spectroscopic investigations of dynamic hydrogen bond structures in hydrated clusters
Grant number：23850018 2011 - 2012
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Research Activity Start-up Grant-in-Aid for Research Activity Start-up
MIZUSE Kenta
Authorship：Principal investigator
Grant amount：\2730000 （ Direct Cost: \2100000 、 Indirect Cost：\630000 ）
The ultimate purpose of this study was real-time observations of hydrogen bond dynamics such as stretchings, dissociations, and rearrangements. I succeeded in tuning intermolecular vibration dynamics of hydrated clusters using so-called messenger-mediated cooling technique. In addition, for real-time observation of molecular dynamics, I designed a femtosecond time-resolved ion/electron imaging setup utilizing my unique concept. I hope these achievements stimulate further studies of molecular dynamics.
-
Design and reconstruction of quantum states of molecular motion
Grant number：22245004 2010.4 - 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)
OHSHIMA Yasuhiro, HASEGAWA Hirokazu, MIZUSE Kenta
Grant amount：\48490000 （ Direct Cost: \37300000 、 Indirect Cost：\11190000 ）
This project has aimed to establish the experimental reconstruction of wave functions pertinent to the degrees of motion characteristic to molecules, i.e., vibration and rotation, and to develop the control technology for creating molecular quantum states as designed. We have made the following achievements: (1) construction of an ion-imaging setup with new configuration and successful application to real-time trucking of propagation of unidirectionaly rotating wave packets, (2) proposal of a new coherent population transfer method based on non-resonant stimulated Raman excitation with frequency-chirped pulses and development of a novel nanosecond pulsed light source to realize the new method, and (3) detailed examination of intermolecular motion in clusters with benzene and hydrogen molecules by adopting high-resolution electronic spectroscopy.
-
巨大サイズ水和クラスターの赤外分光による大規模溶媒和構造の解明
Grant number：08J05015 2008 - 2010
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
水瀬 賢太
Authorship：Principal investigator
Grant amount：\1800000 （ Direct Cost: \1800000 ）
本研究は数十から数百の水分子がつくる、大規模な水素結合ネットワークに対して分光実験を成功させ、そのスペクトルから構造を考察、解明することを目的としている。平成22年度の研究では、最終目的としていた巨大サイズプロトン付加水クラスター200量体までの赤外分光実験に成功し、水分子の配位数やネットワークの環構造という観点からネットワーク構造の描像を考察した。この成果は、水のネットワーク構造という、極めて身近かつ重要な課題に対し、これまでになかった切り口からの情報を与えるものである。また、数百分子からなるきわめて複雑な系においても、分子レベルの構造情報を引き出せることを示した点は大きなbreakthroughであり、ボトムアップ的分子科学における重要な意義がある。さらに、水の取りえる多様なネットワーク構造それぞれの存在比がどのように変わっていくか、また、高エネルギーの光子や粒子の入射によって水のネットワークがどう変わるかといった問題に、10分子程度からなる水クラスターを対象とした赤外分光からアプローチした。それにより、2つの異性体が存在する系において、希ガス付加のような微弱な摂動のみでも両者の存在比は大きくことなることを観測した。また、ラジカルカチオン状態の水クラスター内において、OHラジカルが生成され、それが正電荷から乖離していくことを解明した。特に後者の結果は、放射線治療や核施設での冷却水の反応といった重要な応用を含む、「水中の放射線科学」の詳細な理解につながると期待される。
Teaching Experience
-
Quantum chemistry 1
2025 Institution：Kitasato University
-
Quantum chemistry 2
2025 Institution：Kitasato University
-
Molecular Spectroscopy
2025 Institution：Kitasato University
-
基礎化学演習
2024 Institution：北里大学
-
大学院分子構造学
2022 - 2024 Institution：北里大学
-
Physical ChemistryII
2021 Institution：Kitasato University
-
物理化学実験（赤外分光）
2021 Institution：北里大学
-
基礎化学実験・化学実験（酸塩基）
2020 Institution：北里大学
-
現代化学II（生物科学科向け物理化学・機器分析学）
2020 Institution：北里大学
-
機器分析実践演習（ATR分光）
2020 Institution：北里大学
-
現代化学I（生物科学科向け物理化学）
2020 - 2024 Institution：北里大学
-
量子化学序論演習
2016 - 2020 Institution：東京工業大学
-
物理化学基礎実験（分光器、偏光）
2015 - 2019 Institution：東京工業大学
-
物理化学総合実験（吸着、発光）
2015 - 2019 Institution：東京工業大学
-
化学基礎演習
2015 Institution：東京工業大学
-
物理科学学生セミナー演習
2013.4 - 2014.3 Institution：総合研究大学院大学
-
物理化学実験（発光分光、赤外分光）（TA）
2006.4 - 2010.5 Institution：東北大学
Media Coverage
-
アインシュタイン訪日１００年 時を超え、現代科学を刺激し続ける 「最も深遠な発見」引き出す Newspaper, magazine
新潟日報、佐賀新聞、沖縄タイムス、山陽新聞、徳島新聞、北國新聞、愛媛新聞（web版） 「波」が見えた 2022.12
-
アインシュタインの遺産と現代科学 不思議に満ちた量子力学 Newspaper, magazine
岩手日報、山形新聞、東奥日報、静岡新聞、福井新聞、山陰中央新報、信濃毎日新聞、熊本日日新聞 2022.12
-
Surfing the waves between two worlds Newspaper, magazine
The Japan Times 2015.7
-
毎秒1000億回の分子回転運動 高解像度動画撮影に成功 Newspaper, magazine
科学新聞 1面 2015.7
-
Capturing the Ultrafast Rotations of Quantum-Sized Particles Newspaper, magazine
Asian Scientist Magazine 2015.7
-
分子の回転運動を動画撮影することに成功―量子力学的な波の動きを可視化 Newspaper, magazine
財経新聞 2015.7