Thickness-dependent azobenzene doping in mono- and few-layer graphene

被引：42
作者：
Peimyoo, Namphung [1 ]
Yu, Ting [1 ,2 ]
Shang, Jingzhi [1 ]
Cong, Chunxiao [1 ]
Yang, Huanping [1 ]
机构：
[1] Nanyang Technol Univ, Div Phys & Appl Phys, Sch Phys & Math Sci, Singapore 637371, Singapore
[2] Natl Univ Singapore, Fac Sci, Dept Phys, Singapore 117542, Singapore
来源：
CARBON | 2012年 / 50卷 / 01期
基金：
新加坡国家研究基金会;
关键词：
RAMAN-SPECTROSCOPY; SCATTERING; SINGLE; ORIENTATION; SUBSTRATE; SURFACES; FILMS; EDGES;
D O I：
10.1016/j.carbon.2011.08.035
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：
Doping effects on exfoliated graphenes induced by methyl orange (MO) have been studied by spatially resolved Raman spectroscopy. When the MO molecules were adsorbed on the top of graphenes, the charge transfer between them caused two outcomes simultaneously. One is the strong chemical doping in graphenes and the other is the enhanced Raman signals of MO molecules. Our finding provides a potential approach for manipulating the electronic properties of graphenes and investigating the vibrational properties of molecules. Moreover, the thickness-dependent doping effects in graphenes are unambiguous distinguished by Raman imaging. The possible origin was discussed and designated to the different band structures of graphenes and the screening effect. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：201 / 208
页数：8
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