Symmetry Breaking of Graphene Monolayers by Molecular Decoration

被引：225

作者：

Dong, Xiaochen ^{[1
,4
]}

Shi, Yumeng ^{[1
]}

Zhao, Yang ^{[1
]}

Chen, Dongmeng ^{[1
]}

Ye, Jun ^{[1
]}

Yao, Yugui ^{[5
]}

Gao, Fang ^{[1
]}

Ni, Zhenhua ^{[2
]}

Yu, Ting ^{[2
]}

Shen, Zexiang ^{[2
]}

Huang, Yinxi ^{[3
]}

Chen, Peng ^{[3
]}

Li, Lain-Jong ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore, Singapore

[2] Nanyang Technol Univ, Sch Phys & Math Sci, Singapore, Singapore

[3] Nanyang Technol Univ, Sch Chem & Biomed Engn, Singapore, Singapore

[4] Nanjing Univ Posts & Telecommun, Inst Adv Mat, Nanjing, Peoples R China

[5] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 13期

关键词：

RAMAN-SCATTERING; PHONONS; LAYER;

D O I：

10.1103/PhysRevLett.102.135501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 Gamma point.

引用

页数：4

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