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Raman and surface-enhanced Raman spectroscopy evidence for oxidation-induced decomposition of graphite
Authors:Frank J Owens
Institution:1. Department of Physics, Hunter College and Graduate School, City University of New York, New York, NY, USAfowens@hunter.cuny.edu
Abstract:It has been proposed that reduction of exfoliated graphite oxide could be a potential method for producing large quantities of graphene. Raman and surface-enhanced Raman spectroscopy are used to show that oxidation of graphite and exfoliated graphite significantly increases the defect structure of both materials. This would likely lead to a heavily defected graphene structure when oxygen is removed. To insure the observed decomposition is not due to the laser light, the effect of laser intensity on the materials was investigated. It was found that at the highest laser intensity (1.4 × 108 W/M2) there was a significant increase in defects. However, lower laser intensity was found which did not produce defects and was used in the studies of the effect of oxidation on the spectra.
Keywords:graphite  graphite oxide  Raman spectroscopy
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