2020 Fiscal Year Final Research Report
Hydrogen bond dynamics at water-solid interface by using transient heating and interface sensitive vibrational spectroscopy
| Project/Area Number |
18H01942
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 32010:Fundamental physical chemistry-related
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
奥山 弘 京都大学, 理学研究科, 准教授 (60312253)
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Keywords | 表面・界面 / 振動分光 / 超高速分光 |
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| Outline of Final Research Achievements |
In this study, we have improved the sensitivity of the phase-sensitive sum-frequency generation vibrational spectroscopy under ultra-high vacuum by incorporating balanced-detection scheme. We have successfully obtained the vibrational spectrum of water adsorbed on the step site on a Pt vicinal surface. In addition, we applied two-dimensional electron spectroscopy to an organic thin film under ultra-high vacuum for the first time to reveal the exciton energy fluctuation dynamics on a femtosecond scale. We also investigated the excited state dynamics of molecules in microcavities that leads to a modulation of singlet fission rate due to the polariton formation.
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| Free Research Field |
物理化学、表面化学
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| Academic Significance and Societal Importance of the Research Achievements |
金属や半導体表面での水素発生およびその逆反応，酸素発生およびその逆反応は，燃料電池や水分解光触媒の重要な素過程であり，反応の微視的機構について多くの研究の蓄積がある．しかし，界面の水の分光情報，特に振動分光の知見が乏しいため本質的な理解に至っていない．本研究で開拓・発展させた計測手法の適用により，ヘテロ界面の微視的構造，特にやわらかい構造をもつ分子集合体の界面での構造やダイナミクスの特異性を明らかにすることが可能になると期待され，電気化学や触媒化学等広い分野に波及効果を及ぼすと考えられる．
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