In-situ Raman study of laser-induced graphene oxidation
arXiv:1508.03457 · doi:10.1002/pssb.201552411
Abstract
We present in-situ Raman measurements of laser-induced oxidation in exfoliated single-layer graphene. By using high-power laser irradiation, we can selectively and in a controlled way initiate the oxidation process and investigate its evolution over time. Our results show that the laser-induced oxidation process is divided into two separate stages, namely tensile strain due to heating and subsequent -type doping due to oxygen binding. We discuss the temporal evolution of the -mode ratio during oxidation and explain the unexpected steady decrease of the defect-induced mode at long irradiation times. Our results provide a deeper understanding of the oxidation process in single-layer graphene and demonstrate the possibility of sub-m patterning of graphene by an optical method.
arXiv comment5 pages, 4 figures [submitted as IWEPNM 2015 conference publication to pss(b)]
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