Symmetry breaking of graphene monolayers by molecular decoration

Xiaochen Dong*, Yumeng Shi, Yang Zhao, Dongmeng Chen, Jun Ye, Yugui Yao, Fang Gao, Zhenhua Ni, Ting Yu, Zexiang Shen, Yinxi Huang, Peng Chen, Lain-Jong Li

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

217 Scopus citations

Abstract

Aromatic molecules can effectively exfoliate graphite into graphene monolayers, and the resulting graphene monolayers sandwiched by the aromatic molecules exhibit a pronounced Raman G-band splitting, similar to that observed in single-walled carbon nanotubes. Raman measurements and calculations based on the force-constant model demonstrate that the absorbed aromatic molecules are responsible for the G-band splitting by removing the energy degeneracy of in-plane longitudinal and transverse optical phonons at the Γ point.

Original languageEnglish (US)
Article number135501
JournalPhysical Review Letters
Volume102
Issue number13
DOIs
StatePublished - Mar 30 2009

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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