溴吸附对碳纳米管导电性能的提高  

Conductivity Enhancement in MWNT by Bromine Adsorption

作　　者：唐国强[1] 晋圣松[1] 王红敏[1] 边成香[1] 徐学诚[1] 

机构地区：[1]华东师范大学物理系纳米功能材料与器件应用研究中心,上海200062

出　　处：《化学学报》2007年第23期2776-2780,共5页Acta Chimica Sinica

基　　金：上海市纳米科技专项基金(No.0252nm011)资助项目.

摘　　要：通过溴蒸气的吸附,提高多壁碳纳米管(MWNT)的本征导电性能,加溴多壁碳纳米管的电导率提高3倍.通过拉曼光谱,紫外可见光谱,红外吸收光谱,近红外吸收光谱和X光电子能谱等方法研究,结果表明:溴与多壁碳纳米管之间存在共轭作用,使多壁碳纳米管表面的电子云分布发生了变化,导致空穴载流子的产生,增加了载流子浓度,提高了多壁碳纳米管的导电性能.Through adsorption of bromine vapor, the electrical conductivity of multi-walled carbon nanotubes （MWNT） can be enhanced by 3 times. Raman spectrum, UV-Vis spectra, IR, NIR and XPS spectra were used to characterize the material. The result indicates that there is a conjugative effect between MWNT and bromine, which induces the change of electron distribution on the MWNT surface, It increased the carder density and the electrical conductivity of MWNT became higher.

关 键 词：多壁碳纳米管 导电率 吸附 载流子 

分 类 号：TB383.1[一般工业技术—材料科学与工程]