| 研究実績の概要 |
For this project, graphene grown on Au(111) surface via chemical vapour deposition was investigated. Samples were investigated using STM, STS and STM-TERS. STM imaging revealed the honeycomb structure and Moire patterns typically observed in graphene. The STM-TERS spectra showed the G, D and 2D band of graphene. Moreover, the spectra showed a splitting of the G-band which we attribute to a combination of uniaxial strain, and the presence of defects on the graphene layer. Apart from single point STM-TERS measurement, we were also able to perform STM-TERS mapping. Because of weak Raman signals, STM-TERS mapping is challenging as it required long acquisition times. For this, we utilized the automated remote experiment system we designed. This allowed us to conveniently and safely perform the experiment while not being physically present in the experimental room. The results of the mapping revealed the presence of a domain boundary which was not observed in the STM images.
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