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化学学报
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化学学报 ›› 2007, Vol. 65 ›› Issue (23): 2776-2780. 上一篇    下一篇

研究论文

溴吸附对碳纳米管导电性能的提高

唐国强, 晋圣松, 王红敏, 边成香, 徐学诚*   

  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)
  • 投稿日期:2007-03-07 修回日期:2007-06-01 发布日期:2007-12-14
  • 通讯作者: 徐学诚

Conductivity Enhancement in MWNT by Bromine Adsorption

TANG Guo-Qiang; JIN Sheng-Song; WANG Hong-Min; BIAN Cheng-Xiang; XU Xue-Cheng*   

  1. (Center of Functional Nanomaterials and Devices, Department of Physics, East China Normal University, Shanghai 200062)
  • Received:2007-03-07 Revised:2007-06-01 Published:2007-12-14
  • Contact: XU Xue-Cheng

PDF

855

被引次数

17

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.

关键词: 多壁碳纳米管, 导电率, 吸附, 载流子

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 carrier density and the electrical conductivity of MWNT became higher.

Key words: MWNT, electrical conductivity, adsorption, carrier