Deconvolution of Raman spectra of disordered monolayer graphene: an approach to probe the phonon modes

[摘要] This paper explores the phonon modes from the Raman spectrum of disordered monolayer epitaxial graphene using the deconvolution technique.The phonon density of states (PDOS) of pristine monolayer graphene has been enumerated and convoluted by a Gaussian function to check the accuracy of the deconvolution process.We show that the original PDOS is recovered by deconvolution of the convoluted spectrum with the same spread function.We propose that the PDOS of pristine monolayer graphene is similar to that of the relative intensity of the deconvoluted Raman spectrum of disordered epitaxialgraphene. These results could be used for identifying the intensity of individual phonon modes to justify the structure, and probing the mechanism of changing the phonon modes with various types of defects formed in graphene.

[学科分类] 材料工程

[关键词] Graphene;defects;deconvolution;Raman spectra;phonon mode.