| 研究実績の概要 |
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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