2022 Fiscal Year Final Research Report
Development of tip-enhanced nonlinear and time-resolved spectroscopic methods at the single molecular level
| Project/Area Number |
19H00889
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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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 | University of Hyogo |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2023-03-31
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| Keywords | 走査型トンネル顕微鏡 / 単一分子 / プラズモン / ラマン散乱 / 吸着構造 / 分子構造 |
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| Outline of Final Research Achievements |
We pursued structural study of single organic semiconductor molecules adsorbed on a non-flat surface of a metallic tip by tip-enhanced Raman spectroscopy. We first developed a straightforward optical alignment protocol for pinpointing the nano-gap region, which greatly facilitates optical STM experiments. With this technique, we succeeded in observing Raman scattering from a single adsorbate on the tip surface, revealing its translational motions, adsorption dynamics, and charge-transfer interaction with the metal.
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| Free Research Field |
分子分光学
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| Academic Significance and Societal Importance of the Research Achievements |
分子素子の実現・実用化には個々の分子が機能する精巧な機構と動作機序を分子科学に立脚し、単一分子レベルで解明することが欠かせない。本研究では、極低温・超高真空走査型トンネル顕微鏡のトンネル接合部位に光を照射することで、探針先端近傍に吸着させた有機半導体分子のラマン散乱信号を観測し、その構造情報と吸着ダイナミクスを明らかにした。これにより、分子の置かれた局所環境と分子の特性および振舞いとの相関を理解することができた。
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