期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 16, 期 37, 页码 20236-20240出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4cp02078b
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资金
- JST on A-STEP [AS2525017J]
- JSPS KAKENHI [20510111, 26286066]
- Grants-in-Aid for Scientific Research [26286066] Funding Source: KAKEN
We develop a bulk silver tip for tip-enhanced Raman scattering (TERS) and obtain TERS spectra of epitaxial graphene on the carbon face of 4H-SiC(000-1) with a high signal-to-noise ratio. Thanks to the high quality of TERS spectra we firstly find that the G band in the TERS spectra exhibits position-by-position variations in both lower wavenumber shifts and spectral broadening. The analysis of the variations reveals that the shifts and broadenings have a linear correlation between each other, indicating that the variations are induced by the position dependent local stress on graphene based on a uniaxial strain model.
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