2023 Fiscal Year Final Research Report
Development of rare-event spectroscopy by product detection
| Project/Area Number |
21K18202
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| Research Category |
Grant-in-Aid for Challenging Research (Pioneering)
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| Allocation Type | Multi-year Fund |
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| Review Section |
Medium-sized Section 32:Physical chemistry, functional solid state chemistry, and related fields
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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) |
2021-07-09 – 2024-03-31
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| Keywords | 表面分光 / 和周波発生振動分光 / 二次元電子分光 / 白金 / 水 |
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| Outline of Final Research Achievements |
We have developed a sum-frequency generation spectroscopy with a phase-sensitive detection utilizing a balanced-detection scheme combined with an ultra-high vacuum chamber, capable of determining the absolute orientation of a sub-monolayer adsorbate on a metal surface. By using this, water orientations and reactions with oxygen atoms at the step sites on stepped platinum single-crystal surfaces have been studied. We found that the step conditions determine the water orientations over entire surfaces. We further developed a temperature-controlled two-dimensional electronic spectroscopy combined with an ultrahigh vacuum system, which enables us to study exciton-energy fluctuations in ultrathin organic films. We studied the temperature dependence of the spectral diffusion in rubrene thin films by using this system.
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| Free Research Field |
物理化学
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| Academic Significance and Societal Importance of the Research Achievements |
固体表面での化学反応は，電気化学や不均一触媒反応の素過程として非常に重要だが，その微視的な機構については未だ不明な点が多い．複雑な反応機構を理解するためには，実験的に界面での反応素過程を追跡する新規実験手法の開拓が必要である．本研究の成果は，既存の計測手法では不可能であった微量な吸着種の構造やダイナミクスの計測を可能にするものであり，界面での重要な反応機構の理解をもたらす礎となるものだと期待される．
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