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In this work, we studied the Raman spectra characteristics, strain distribution and carrier concentration of monolayer graphene wrinkles on a Au(111) crystal facet using tip-enhanced Raman spectroscopy (TERS) in ambient. G-band splitting was observed in certain areas of the wrinkle indicating the presence of anisotropic strain. A broad background was also observed in the near-field spectra that is hypothesized to be electronic Raman scattering originating from the graphene monolayer and the Au(111) substrate. Hence, careful spectral analysis must be done since this broad background potentially contains information on the sample.
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