Doublet of D and 2D bands in graphene deposited with Ag nanoparticles by surface enhanced Raman spectroscopy

被引：36
|
作者：
Li, Lilin [1 ]
An, Baoshan [1 ]
Lahiri, Abhishek [2 ]
Wang, Peijie [1 ]
Fang, Yan [1 ]
机构：
[1] Capital Normal Univ, Beijing Key Lab Nanophoton & Nanostruct, Dept Phys, Beijing 100048, Peoples R China
[2] Tech Univ Clausthal, Inst Electrochem, D-38678 Clausthal Zellerfeld, Germany
来源：
CARBON | 2013年 / 65卷
基金：
中国国家自然科学基金;
关键词：
SINGLE-LAYER; SCATTERING; GOLD; SILVER;
D O I：
10.1016/j.carbon.2013.08.039
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Surface enhanced Raman spectrum of graphene was obtained by modifying graphene with Ag nano-particles. The doublet of D band and 2D band was observed due to surface enhanced Raman scattering (SERS) enhancement and relaxation of the selection rules originated from the interaction of Ag nano-particles and graphene. The difference in the doublet of D band in which the separation between the two peaks is 11 cm(-1) is close to the theoretical value of 9 cm(-1) and can be attributed to the disorder and edge effect. The doublet of 2D band can be assigned to the asymmetry of dispersion relation along KM and K Gamma respectively. The phonon mode at 1510 cm(-1) can be associated with the iTO phonon near Gamma K/4. This confirms the phonon dispersion based on double resonance (DR) theory in iTO branch. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：359 / 364
页数：6
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