Raman Radial Mode Revealed from Curved Graphene

The Journal of Physical Chemistry Letters
Jae-Kap LeeDong Ju Moon

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 ∼100 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 ≈ 1 nm) and bilayer (118 cm-1 peak) (c ≈ 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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Citations

Apr 13, 2021·Acta Crystallographica Section B, Structural Science, Crystal Engineering and Materials·Jae Kap LeeSang Gil Lee

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