Symmetry breaking of graphene monolayers by molecular decoration

Symmetry breaking of graphene monolayers by molecular decoration

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 base...

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Bibliographic Details
Main Authors: Dong, Xiaochen, Shi, Yumeng, Zhao, Yang, Chen, Dongmeng, Ye, Jun, Yao, Yugui, Gao, Fang, Ni, Zhenhua, Yu, Ting, Shen, Zexiang, Huang, Yinxi, Chen, Peng, Li, Lain-Jong
Other Authors: School of Materials Science & Engineering
Format: Article
Language:English
Published: 2011
Subjects:
DRNTU::Engineering::Materials::Microelectronics and semiconductor materials
Online Access:https://hdl.handle.net/10356/92318
http://hdl.handle.net/10220/6745
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Institution: Nanyang Technological University
Language: English
Description
Summary: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.

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