| 研究課題/領域番号 |
16F16045
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| 研究機関 | 国立研究開発法人理化学研究所 |
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研究代表者 |
金 有洙 国立研究開発法人理化学研究所, Kim表面界面科学研究室, 主任研究員 (50373296)
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| 研究分担者 |
WALEN HOLLY 国立研究開発法人理化学研究所, Kim表面界面科学研究室, 外国人特別研究員
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| 研究期間 (年度) |
2016-10-07 – 2019-03-31
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| キーワード | STM / insulating monolayer |
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| 研究実績の概要 |
Dr. Walen has successfully built an UHV chamber in order to grow h-BN films on a metal substrate, followed by optimizing h-BN film growth condition. Finally, she fabricated a well-grown h-BN monolayer islands on a Cu(111) single-crystal surface. The quality of h-BN monolayers was then analyzed and confirmed by LEED, XPS and STM.
The h-BN monolayer growth was tested to examine if it is applicable to electronic decoupling between a molecular adsorbate and metal substrate. Single molecule fluorescence measurement is the most powerful method to do that, because fluorescence cannot be measured if the coupling is not enough. She measured a weak fluorescence signal from a free-base phthalocyanine molecule on the h-BN/Cu(111), which implies that the electric decoupling is not enough.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
It is crucial to introduce ultrathin insulating film between the molecule and metal substrate. Dr. Walen has successfully fabricate an well-defined insulating h-BN monolayer on the Cu substrate. Although it turned out that the monolayer was not enough to decouple electronic hybridization between molecular orbital and metal d band, she found that multilayers of h-BN might be able to be used as a good insulater.
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| 今後の研究の推進方策 |
Multilayer of h-BN will be fabricated on Ni single-crystal surface, because Cu surface allows only a monolayer film. Single-molecule fluorescence measurement from a free-base phthalocyanine molecule on the multilayer h-BN/Ni(111) will be carried out for examining electronic decoupling. Finally, TMD layers will be transferred on to the multilayer h-BN/Ni(111) to investigate local electronic structure.
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