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Effect of Gold Substrates on the Raman Spectra of Graphene

Cited 24 time in Web of Science Cited 27 time in Scopus
Issue Date
2010-04
Citation
Bulletin of the Korean Chemical Society, Vol.31 No.4, pp.999-1003
Keywords
GrapheneRamanGoldNanoparticlesSurface Enhanced Raman Scattering
Abstract
Raman spectra of a single layer graphene sheet placed in different gold substrates were obtained and are discussed in the context of surface enhanced Raman scattering (SERS) The gold substrates were composed of a combination of a thermally deposited gold film and a close-packed gold nanosphere layer The SERS effects were negligible when the excitation wavelength was 514 nm, while the Raman signals were enhanced 3- to 50-fold when the excitation wavelength was 633 nm The large SERS enhancement accompanied a spectral distortion with appearance of several unidentifiable peaks, as well as enhancement of a broadened D peak. These phenomena are interpreted as the local field enhancement in the nanostructure c of the gold substrates The difference in the enhancement factors among the various gold substrates is explained with a model in which the spatial distribution and polarization of the local field and the orientation of the inserted graphene sheet are considered important
ISSN
0253-2964
URI
https://hdl.handle.net/10371/172171
DOI
https://doi.org/10.5012/bkcs.2010.31.04.999
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College of Natural Sciences (자연과학대학)Dept. of Chemistry (화학부)Journal Papers (저널논문_화학부)
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