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OHTA Kaoru
Molecular Photoscience Research Center
Research Fellow

Researcher basic information

■ Research Keyword
  • physical chemistry
■ Research Areas
  • Nanotechnology/Materials / Basic physical chemistry

Research activity information

■ Paper
  • Several Orders of Magnitude Difference in Charge-Transfer Kinetics Induced by Localized Trapped Charges on Mixed-Halide Perovskites
    Izuru Karimata, OHTA KAORU, KOBORI YASUHIRO, TACHIKAWA TAKASHI
    Oct. 2018, ACS Applied Materials & Interfaces, 2018(10) (10), 37057 - 37066, English
    [Refereed]
    Scientific journal

  • Masaki Okuda, Masahiro Higashi, Kaoru Ohta, Shinji Saito, Keisuke Tominaga
    Mar. 2018, Chemical Physicsspecial issue on time-resolved vibrational spectroscopies in honor of Ted Heilweil, English
    [Refereed][Invited]
    Scientific journal

  • Masaki Okuda, Kaoru Ohta, Keisuke Tominaga
    American Chemical Society, Feb. 2018, Journal of Physical Chemistry A, 122(4) (4), 946 - 954, English
    [Refereed]
    Scientific journal

  • Kaoru Ohta, Shunrou Tokonami, Kotaro Takahashi, Yuto Tamura, Hiroko Yamada, Keisuke Tominaga
    Nov. 2017, JOURNAL OF PHYSICAL CHEMISTRY B, 121(43) (43), 10157 - 10165, English
    [Refereed]
    Scientific journal

  • Jessica Afalla, Kaoru Ohta, Shunrou Tokonami, Elizabeth Ann Prieto, Gerald Angelo Catindig, Karl Cedric Gonzales, Rafael Jaculbia, John Daniel Vasquez, Armando Somintac, Arnel Salvador, Elmer Estacio, Masahiko Tani, Keisuke Tominaga
    Nov. 2017, JAPANESE JOURNAL OF APPLIED PHYSICS, 56(11) (11), 111203, English
    [Refereed]
    Scientific journal

  • Comparison of vibrational dynamics between non-ionic and ionic vibrational probes in water: Experimental study with two-dimensional infrared and infrared pump-probe spectroscopies
    OKUDA Masaki, OHTA Kaoru, TOMINAGA Keisuke
    2016, J. Chem. Phys., 145(11) (11), 114503, English
    [Refereed]
    Scientific journal

  • Broadband Dielectric Spectroscopy on Lysozyme in the sub-Gigahertz to Terahertz Frequency Regions: Effects of Hydration and Thermal Excitation
    YAMAMOTO Naoki, OHTA Kaoru, ANDACHI Tomoyo, TAMURA Atsuo, TOMINAGA Keisuke
    2016, J. Phys. Chem. B, 120(21) (21), 4743 - 4755, English
    [Refereed]
    Scientific journal

  • Vibrational Dynamics of the CN Stretching in the Electronically Excited State by UV and Visible-Pump and Infrared-Probe Spectroscopy
    Sho Hiraoka, Kaoru Ohta, Keisuke Tominaga
    Mar. 2015, “Ultrafast Phenomena XIX”, edited by Kaoru Yamanouchi, Steven Cundiff, Regina de Vivie-Riedle, Makoto Kuwata-Gonokami, Louis DiMauro, Springer, 487 - 491, English
    International conference proceedings

  • Vibrational Dynamics of Nitrosyl Stretch of Ru Complex in Aqueous Solution Studied by Two-Dimensional Infrared Spectroscopy
    Kaoru Ohta, Kyoko Aikawa, Keisuke Tominaga
    Mar. 2015, "Ultrafast Phenomena XIX”, edited by Kaoru Yamanouchi, Steven Cundiff, Regina de Vivie-Riedle, Makoto Kuwata-Gonokami, Louis DiMauro, Springer, 479–482, English
    International conference proceedings

  • Vibrational Dynamics of the CO Stretching of 9-Fluorenone Studied by Visible-pump and Infrared-probe Spectroscopy
    Yuki Fukui, Kaoru Ohta, Keisuke Tominaga
    Feb. 2015, Faraday Discussion, English
    [Refereed]
    Scientific journal

  • Vibrational Dynamics of the CO Stretching of 9-Fluorenone Studied by Visible-pump and Infrared-probe Spectroscopy
    FUKUI Yuki, OHTA Kaoru, TOMINAGA Keisuke
    2015, Faraday Discuss., 177, 65 - 75, English
    [Refereed]
    Scientific journal

  • Vibrational dynamics of azide-derivatized amino acids studied by nonlinear infrared spectroscopy
    OKUDA Masaki, OHTA Kaoru, TOMINAGA Keisuke
    2015, J. Chem. Phys., 142, 212418, English
    [Refereed][Invited]
    Scientific journal

  • Charge-Carrier Dynamics in Benzoporphyrin Films Investigated by Time-Resolved THz Spectroscopy
    OHTA Kaoru, HIRAOKA Sho, TAMURA Yuto, YAMADA Hiroko, TOMINAGA Keisuke
    2015, Appl. Phys. Lett., 107, 183302, English
    [Refereed]
    Scientific journal

  • Temperature Dependence of Vibrational Frequency Fluctuation of N3- in D2O
    J. Tayama, A. Ishihara, M. Banno, K. Ohta, S. Saito, TOMINAGA Keisuke
    Jul. 2010, J. Chem. Phys., 133・1・14505, English
    [Refereed]
    Scientific journal

  • Vibrational dynamics of the CN stretching mode of [Ru(CN)6]4- in D2O studied by nonlinear infrared spectroscopy
    J. Tayama, M. Banno, K. Ohta, TOMINAGA Keisuke
    Jun. 2010, SCIENCE CHINA Physics, Mechanics & Astronomy, 53・ 1013-1019, English
    [Refereed]
    Scientific journal

  • Sub-picosecond UV-pump and IR-probe Spectroscopy of 9-Fluorenone in Deuterated Acetonitrile and Methanol
    S. Hirai, M. Banno, K. Ohta, D. K. Palit, TOMINAGA Keisuke
    May 2010, Chem. Lett., 39・9・932-934, English
    [Refereed]
    Scientific journal

  • Vibrational dynamics of hydrogen-bonded complexes in solution studied with ultrafast infrared pump-probe spectroscopy
    M. Banno, K. Ohta, S. Yamaguchi, S. Hirai, TOMINAGA Keisuke
    Sep. 2009, Acc. Chem. Res., 42・9・1259-1269, English
    [Refereed]
    Scientific journal

  • Ultrafast Vibrational Dynamics and Solvation Complexes of Methyl Acetate in Methanol Studied by Sub-picosecond Infrared Spectroscopy
    M. Banno, K. Ohta, TOMINAGA Keisuke
    Nov. 2008, J. Raman Spectroscopy, 39・11・ 1531-1537, English
    [Refereed]
    Scientific journal

  • Vibrational Dynamics of Benzoic Acid in Nonpolar Solvents Studied by Subpicosecond Infrared Pump-Probe Spectroscopy
    S. Yamaguchi, M. Banno, K. Ohta, TOMINAGA Keisuke, T. Hayashi
    Sep. 2008, Chem. Phys. Lett., 462・ 4-6・238-242, English
    [Refereed]
    Scientific journal

  • Ultrafast Dynamics of the Carbonyl Stretching Vibration in Acetic Acid in Aqueous Solution Studied by Sub-Picosecond Infrared Spectroscopy
    M. Banno, K. Ohta, TOMINAGA Keisuke
    May 2008, J. Phys. Chem. A, 112・ 18・4170-4175, English
    [Refereed]
    Scientific journal

  • Vibrational Dynamics of the CO Stretching Mode of 9-Fluorenone in Alcohol Solution
    S. Hirai, M. Banno, K. Ohta, D. K. Palit, TOMINAGA Keisuke
    Dec. 2007, Chem. Phys. Lett., 450・1-3・44-48, English
    [Refereed]
    Scientific journal

  • Vibrational Population Relaxation of Hydrogen-Bonded Phenol Complexes in Solution: Investigation by Ultrafast Infrared Pump-Probe Spectroscopy
    K. Ohta, TOMINAGA Keisuke
    Nov. 2007, Chem. Phys., 341・ 1-3・ 310-319, English
    [Refereed]
    Scientific journal

■ MISC
  • タンパク質の動的挙動に及ぼす水和および熱活性の影響;広帯域誘電分光法による観測
    YAMAMOTO Naoki, OHTA Kaoru, TAMURA Atsuo, TOMINAGA Keisuke
    応用物理学会, 2016, 応用物理, 85(8) (8), 689 - 692, Japanese
    [Refereed]
    Introduction scientific journal

  • 水の構造揺らぎを実時間でとらえる-超高速赤外分光法によるアプローチ
    太田 薫
    2004, 月刊「化学」, Vol.59 62-63, Japanese
    [Refereed]
    Others

  • Vibrational Dynamics of the OH Stretching Mode of Water in Reverse Micelles Studied by Infrared Nonlinear Spectroscopy
    MAEKAWA Hiroaki, OHTA Kaoru, TOMINAGA Keisuke
    2004, MRS Symposium Proceedings, Vol.790 P7.29.1-6, English
    [Refereed]
    Others

  • Vibrational Dynamics in Liquids Studied by Infrared Nonlinear Spectroscopy
    OHTA Kaoru, MAEKAWA Hiroaki, TOMINAGA Keisuke
    2004, Trombay Symposium on Radiation andPhotochemistry, Vol.1 24-27, English
    [Refereed]
    Others

■ Books And Other Publications
  • Vibrational dynamics of [RuCl5(NO)]2- in aqueous solution studied by nonlinear infrared spectroscopy
    Kyoko Aikawa, Jumpei Tayama, Motohiro Banno, Kaoru Ohta, TOMINAGA Keisuke
    Others, Proceedings TSRP-2012, 2012, English
    Scholarly book

  • Low-frequency dynamics of water: relation to the fluctuation of the solute molecule
    TOMINAGA Keisuke, Jumpei Tayama, Akane Ishihara, Akina Kariya, Mami Takatsuka, Motohiro Banno, Kaoru Ohta, Shinji Saito, Seiji Akimoto
    Others, Proceedings of 3rd International THz-Bio Workshop, 2012, English
    Scholarly book

■ Lectures, oral presentations, etc.
  • Localized Trapped Charges Induce Slow Charge Transfer over a Few Nanoseconds on Heterostructured CH3NH3PbBr3-xIx
    ○Izuru Karimata, Kaoru Ohta, Yasuhiro Kobori, Takashi Tachikawa
    10th Asian Photochemistry Conference (APC2018), Dec. 2018, English, Howard Civil Service Internationl House(Taipei), International conference
    Poster presentation

  • Charge Carrier Dynamics in Diketopyrrolopyrrole-Linked Tetrabenzoporphyrin Based Bulk Heterojunction Thin Films Probed by Time-Resolved Terahertz Spectroscopy
    Kaoru Ohta
    Indo-Japan mini-workshop Frontiers in Molecular Spectroscopy: From Fundamentals to Applications in Chemistry and Biology, Oct. 2018, English, 神戸大学, Domestic conference
    Oral presentation

  • 混合ハロゲン化物ペロブスカイトにおける電荷キャリアダイナミクス
    TACHIKAWA TAKASHI, 狩俣 出, OHTA KAORU, KOBORI YASUHIRO
    2018年光化学討論会, Sep. 2018, Japanese, 関西学院大学・上ケ原キャンパス, Domestic conference
    Oral presentation

  • 光ポンプ-テラヘルツプローブ分光法によるバルクヘテロ接合型有機半導体薄膜における電荷キャリアダイナミクス
    平松 優一, OHTA KAORU, 高橋 功太郎, 鈴木 充朗, 山田 容子, TOMINAGA KEISUKE
    2018年光化学討論会, Sep. 2018, Japanese, 関西学院大学・上ケ原キャンパス, Domestic conference
    Poster presentation

  • タンパク質の広帯域誘電分光;水和水ダイナミクスおよびその熱活性の検証
    山本 直樹, 伊藤 奨太, OHTA KAORU, 中西 真大, TAMURA ATSUO, 井上 圭一, 神取 秀樹, CHATANI ERI, TOMINAGA KEISUKE
    第18回日本蛋白質科学会, Jun. 2018, Japanese, 朱鷺メッセ, Domestic conference
    Poster presentation

  • Terahertz Molecular Science in Condensed Phases
    Masaki Okuda, Kaoru Ohta, Keisuke Tominaga
    36th Samahang Pisika ng Pilipinas Physics Conference, Jun. 2018, English, Palawan, Philippines, International conference
    [Invited]
    Invited oral presentation

  • Charge Carrier Dynamics in Porphyrin-Based Organic ThinFilms Studied by Time-Resolved Terahertz Spectroscopy
    OHTA Kaoru, HIRAMATSU Yuichi, TAKAHASHI Kohtarou, TAMURA Yuto, YAMADA Hiroko, TOMINAGA Keisuke
    Kobe Mini-Symposium on Exciton and Charge Dynamics, Nov. 2017, English, Kobe University, International conference
    [Invited]
    Invited oral presentation

  • 二次元赤外分光法による水溶液中における9-フルオレノン誘導体の振動ダイナミクスの解明
    奥田 真紀, OHTA KAORU, TOMINAGA KEISUKE
    第11回分子科学討論会2017仙台, Sep. 2017, Japanese, 東北大学 川内北キャンパス, Domestic conference
    Oral presentation

  • 時間分解テラヘルツ分光法によるポルフィリン系有機薄膜の電荷キャリアの生成と緩和過程の研究
    OHTA KAORU, 平松 優一, 高橋 功太郎, 田村 悠人, 山田 容子, TOMINAGA KEISUKE
    第11回分子科学討論会2017仙台, Sep. 2017, Japanese, 東北大学 川内北キャンパス, Domestic conference
    Oral presentation

  • 広帯域分光法及び分子動力学シミュレーションによるグアニジウムイオン及びテトラメチルアンモニウムイオンの水和水のダイナミクス
    奈良 隆史, 奥田 真紀, OHTA KAORU, TOMINAGA KEISUKE
    第11回分子科学討論会2017仙台, Sep. 2017, Japanese, 東北大学 川内北キャンパス, Domestic conference
    Oral presentation

  • 光ポンプ-テラヘルツプローブ分光法によるバルクヘテロ接合型有機半導体における電荷キャリアダイナミクス
    平松 優一, OHTA KAORU, 高橋 功太郎, 山田 容子, TOMINAGA KEISUKE
    第11回分子科学討論会2017仙台, Sep. 2017, Japanese, 東北大学 川内北キャンパス, Domestic conference
    Poster presentation

  • Development of Wavefront Shaping Technique for UltrashortOptical Pulses
    OHTA Kaoru
    6th International Conference on Photoinduced Phase Transitions, Jun. 2017, English, Sendai International Center, International conference
    Poster presentation

  • Charge Carrier Dynamics in Porphyrin Based OrganicSemiconductors Studied by Time-Resolved Terahertz Spectroscopy
    OHTA Kaoru, Shunrou Tokonami, HIRAMATSU Yuichi, Kohtaro Takahashi, Yuto Tamura, Hiroko Yamada, TOMINAGA Keisuke
    6th International Conference on Photoinduced Phase Transitions, Jun. 2017, English, Sendai International Center, International conference
    Poster presentation

  • 二次元赤外分光法および分子動力学シミュレーションによる水溶液中における溶質分子の振動数揺らぎの解明
    奥田 真紀, 東 雅大, OHTA KAORU, 斉藤 真司, TOMINAGA KEISUKE
    スーパーコンピュータワークショップ2017, Feb. 2017, Japanese, 岡崎コンファレンスセンター, Domestic conference
    Poster presentation

  • 広帯域誘電分光法及び赤外分光による有機イオンの水和水の動的挙動
    奈良 隆史, 奥田 真紀, OHTA KAORU, TOMINAGA KEISUKE
    スーパーコンピュータワークショップ2017, Feb. 2017, Japanese, 岡崎コンファレンスセンター, Domestic conference
    Poster presentation

  • Development of Wavefront Shaping Technique for Ultrashort Optical Pulse
    OHTA Kaoru
    9th Asian and Oceanian Photochemistry Conference, Dec. 2016, English, Singapore, International conference
    Poster presentation

  • Charge Carrier Dynamics in Porphyrin-Based Organic Semiconductors Studied by Optical Pump-Terahertz Probe Spectroscopy
    OHTA Kaoru
    9th Asian and Oceanian Photochemistry Conference, Dec. 2016, English, Singapore, International conference
    [Invited]
    Invited oral presentation

  • 時間分解テラヘルツ分光法で観る有機薄膜の電荷キャリアダイナミクス
    OHTA Kaoru
    平成28年度 第1回テラヘルツ技術セミナー「テラヘルツ分子科学の進展」, Oct. 2016, Japanese, 神戸, Domestic conference
    [Invited]
    Invited oral presentation

  • 二次元赤外分光法および分子動力学シミュレーションによる水溶液中における溶質分子の振動数揺らぎの解明
    奥田 真紀, 東 雅大, OHTA KAORU, 斉藤 真司, TOMINAGA KEISUKE
    第10回分子科学討論会, Sep. 2016, Japanese, 神戸ファッションマート, Domestic conference
    Oral presentation

  • 時間分解テラヘルツ分光法によるジケトピロロピロール連結テトラベンゾポルフィリン薄膜の電荷キャリアダイナミクス
    OHTA KAORU, 床次 俊郎, 高橋 功太郎, 田村 悠人, 山田 容子, TOMINAGA KEISUKE
    第10回分子科学討論会, Sep. 2016, Japanese, 神戸ファッションマート, Domestic conference
    Oral presentation

  • 広帯域分光法によるテトラフェニルホウ酸イオンの水和水の動的挙動に関する研究
    奈良 隆史, OHTA KAORU, TOMINAGA KEISUKE
    第10回分子科学討論会, Sep. 2016, Japanese, 神戸ファッションマート, Domestic conference
    Poster presentation

  • 広帯域分光による水/ジメチルスルホキシド二成分液体中におけるタンパク質の構造安定性
    飯沼 美紀, YAMAMOTO NAOKI, OHTA KAORU, CHATANI ERI, TOMINAGA KEISUKE
    第10回分子科学討論会, Sep. 2016, Japanese, 神戸ファッションマート, Domestic conference
    Poster presentation

  • Probing Charge Transfer Dynamics in Porphyrin-Based Organic Semiconductors by Time-Resolved THz Spectroscopy
    OHTA Kaoru
    41th International Conference on Infrared, Millimeter, and Terahertz Waves, Sep. 2016, English, Copenhagen, Sweden, International conference
    Poster presentation

  • H218Oとその同位体の複素誘電率測定と水素結合ダイナミクスに関する理論計算
    中塚 真莉子, 奧田 真紀, YAMAMOTO NAOKI, OHTA KAORU, 斉藤 真司, TOMINAGA KEISUKE
    第10回分子科学討論会, Sep. 2016, Japanese, 神戸ファッションマート, Domestic conference
    Poster presentation

  • 時間分解テラヘルツ分光法による有機半導体薄膜の電荷キャリアダイナミクス
    OHTA Kaoru
    テラヘルツ波科学技術と産業開拓第182委員会第26回研究会, Dec. 2015, Japanese, 大阪, Domestic conference
    [Invited]
    Invited oral presentation

  • Probing charge carrier dynamics in benzoporphyrin thin films by time-resolved THz spectroscopy
    OHTA Kaoru
    Pacifichem 2015 “Dynamical Processes of Light Harvesting Surfaces”, Dec. 2015, English, Honolulu, USA, International conference
    Oral presentation

  • 時間分解テラヘルツ分光法によるベンゾポルフィリン薄膜の電荷キャリアダイナミクス
    OHTA Kaoru
    2015年光化学討論会, Sep. 2015, Japanese, 大阪, Domestic conference
    Oral presentation

  • 広帯域テラヘルツ時間分解分光法による有機半導体薄膜の電荷キャリアダイナミクス
    OHTA Kaoru
    第9回分子科学討論会2015, Sep. 2015, Japanese, 東京, Domestic conference
    Oral presentation

  • Charge carrier dynamics in benzoporphyrin films investigated by time-resolved THz spectroscopy
    OHTA Kaoru
    Kobe mini-symposium on “Application of THz Spectroscopy on Condensed Phases, Sep. 2015, English, Kobe, International conference
    [Invited]
    Invited oral presentation

  • Charge Carrier Dynamics in Benzoporphyrin Thin Films Investigated by Time-Resolved THz Spectroscopy
    OHTA Kaoru
    40th International Conference on Infrared, Millimeter, and Terahertz Waves, Aug. 2015, English, Hong Kong, China, International conference
    Oral presentation

  • Charge Carrier Dynamics in Benzoporphyrin Thin Films Investigated by Optical Pump-Terahertz Probe Spectroscopy
    OHTA Kaoru
    International Conference on Photochemistry, Jun. 2015, English, Jeju Island, Korea, International conference
    Oral presentation

  • 非線形赤外分光法を通して見る凝縮系での構造揺らぎと振動ダイナミクス
    OHTA Kaoru
    日本分光学会 中国四国支部 平成27年度年次講演会「線形・非線形分光による緩和過程研究」, Jan. 2015, Japanese, 広島, Domestic conference
    [Invited]
    Invited oral presentation

  • Vibrational Dynamics of Nitrosyl Stretch of Ru Complex in Aqueous Solution Studied by Two-Dimensional Infrared Spectroscopy
    Kaoru Ohta, Keisuke Tominaga
    19th International Conference on Ultrafast Phenomena, Jul. 2014, English, Okinawa, Japan, International conference
    Oral presentation

  • Comparison of Frequency Fluctuation between the Vibrational State and Electronic State in Aqueous Solution
    TOMINAGA Keisuke, J. Tayama, A. Kariya, M. Takatsuka, A. Ishihara, M. Banno, K. Ohta, S. Saito, S. Akimoto
    15th International Conference on Time-Resolved Vibrational Spectroscopy (TRVS), Jun. 2011, English, Ascona, Switzerland, International conference
    [Invited]
    Invited oral presentation

  • Comparison of frequency fluctuation between the vibrational state and electronic state in aqueous solution
    TOMINAGA Keisuke, J. Tayama, A. Kariya, A. Ishihara, M. Banno, K. Ohta, S. Saito, S. Akimoto
    Molecular Dynamics in Complex Environments: Theory and Experiments, the International Chemical Congress of Pacific Basin Societies, Dec. 2010, English, Honolulu, USA, International conference
    [Invited]
    Invited oral presentation

  • Vibrational Dynamics of Hydrogen-Bonded Complexes Studied by Infrared Pump-Probe Spectroscopy
    TOMINAGA Keisuke, S. Hirai, S. Yamaguchi, K. Ikeshima, M. Banno, K. Ohta
    The Sixth Asia Pacific Laser Symposium (APLS 2008), Jan. 2008, English, 名古屋, International conference
    Oral presentation

  • Infrared Nonlinear Spectroscopy on Hydrogen Bonding Complexes in Solution
    S. Yamaguchi, S. Hirai, M. Banno, K. Ohta, TOMINAGA Keisuke
    5th Asian Conference on Ultrafast Phenomena, Jan. 2008, English, Singapore, International conference
    [Invited]
    Invited oral presentation

  • Vibrational Dynamics in Hydronge-Bonding and Non-Hydrogen Bonding Liquids and Complexes
    K. Ohta, TOMINAGA Keisuke
    13th International Conference on Time- Resolved Vibrational Spectroscopy, May 2007, English, Freising, Germany, International conference
    Poster presentation

  • 水溶液中における遷移金属イオンのフェムト秒ポンプ-プローブ分光
    巴山 顕作, 太田 薫, 富永 圭介
    光化学討論会, 2004, Japanese, 未記入, 筑波, Domestic conference
    Oral presentation

  • 水溶液中における遷移金属イオンのフェムト秒ポンプープローブ分光
    巴山 顕作, 太田 薫, 富永 圭介
    分子研研究会, 2004, Japanese, 未記入, 岡崎, Domestic conference
    Oral presentation

■ Research Themes
TOP