Journal
CARBON
Volume 48, Issue 5, Pages 1592-1597Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2009.12.057
Keywords
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Funding
- Brazilian Agencies CNPq
- Brazilian Agencies CNPq, FINEP and FAPERJ
- American Agency AFOSR/SOARD [FA9550-08-1-0236]
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Raman scattering is used to study disorder in graphene subjected to low energy (90 eV) Ar' ion bombardment The evolution of the intensity ratio between the G band (1585 cm(-1)) and the disorder-induced D band (1345 cm(-1)) with ion dose is determined, providing a spectroscopy-based method to quantify the density of defects in graphene This evolution can be fitted by a phenomenological model, which is in conceptual agreement with a well-established amorphization. trajectory for graphitic materials Our results show that the broadly used Tuinstra-Koenig relation should be limited to the measure of crystallite sizes, and allows extraction of the Raman relaxation length for the disorder-induced Raman scattering process (C) 2010 Elsevier Ltd All rights reserved
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