Temperature Dependence of the Raman Spectra of Graphene and Graphene Multilayers
University of California, Riverside
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Abstract
We investigated the temperature dependence of the frequency of G peak in the Raman spectra of graphene on Si/SiO2 substrates. The micro-Raman spectroscopy was carried out under the 488 nm laser excitation over the temperature range from -190 to +100 degrees C. The extracted value of the temperature coefficient of G mode of graphene is chi = -0.016 cm-1/ degrees C for the single layer and chi = -0.015 cm-1/ degrees C for the bilayer. The obtained results shed light on the anharmonic properties of graphene.
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Topics
Keywords
- Graphene
- Raman spectroscopy
- Materials science
- Anharmonicity
- Bilayer graphene
- Atmospheric temperature range
- Analytical Chemistry (journal)
- Spectral line
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