Raman Radial Mode Revealed From Curved Graphene
JOURNAL OF PHYSICAL CHEMISTRY LETTERS(2017)
Abstract
One of the unsolved fundamental issues of graphene is establishing an appropriate way to discern layers of graphene structures. We report a simple methodology to analyze graphene structures using Raman signals in the range of similar to 100 to similar to 500 cm(-1) comprising clear 118 or 175 cm(-1) peaks. We demonstrate that the low-energy signals on Raman spectra of plasma-seeded grown graphene sheets originated from nanocurvature (c) of mono- (175 and 325-500 cm(-1) signals) (c approximate to 1 nm) and bilayer (118 cm(-1) peak) (c approximate to 2 nm) graphene with Raman simulations, based on Raman radial mode (RM) Eigen vectors. Our RM model provides a standard way of identifying and evaluating graphene structures.
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