2023 Fiscal Year Annual Research Report
Tip enhanced Terahertz - Raman for investigating graphene-water interactions at the nanoscale
| Project/Area Number |
22KF0394
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| Allocation Type | Multi-year Fund |
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| Research Institution | Institute of Physical and Chemical Research |
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Principal Investigator |
金 有洙 国立研究開発法人理化学研究所, 開拓研究本部, 主任研究員 (50373296)
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| Co-Investigator(Kenkyū-buntansha) |
JACULBIA RAFAEL 国立研究開発法人理化学研究所, 開拓研究本部, 外国人特別研究員
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| Project Period (FY) |
2023-03-08 – 2024-03-31
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| Keywords | graphene / STM / Raman spectroscopy / defect / strain |
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| Outline of Annual Research Achievements |
Graphene is one of the most promising two-dimensional material because of its unique properties. Here, we use STM-based tip enhanced Raman spectroscopy (TERS) to investigate graphene samples. Samples were grown on Au(111) substrates using chemical vapour deposition. Then they were studied using STM imaging, scanning tunneling spectroscopy and STM-TERS. The STM imaging showed Moire patterns and honeycomb structures which are signatures of graphene. The STM-TERS spectra showed the D, 2D, 2D’, and G-band of graphene. Both STS and STM-TERS mapping across an impurity on the sample was performed. We found that the intensity map of the D peak corresponds well to the STS map at around the Fermi level.
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