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化学学报
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化学学报 ›› 2008, Vol. 66 ›› Issue (20): 2279-2284. 上一篇    下一篇

研究论文

聚噻吩/多壁碳纳米管复合材料结构与导电机理的研究

王红敏 梁 旦 韩菲菲 唐国强 徐学诚*

  

  1. (华东师范大学物理系纳米功能材料与器件研究中心 上海 200062)

  • 投稿日期:2007-11-02 修回日期:2008-04-01 发布日期:2008-10-28
  • 通讯作者: 徐学诚

Structure and Conducting Mechanism of Polythiophene/Multi-Walled Carbon Nanotube Composites

WANG, Hong-Min LIANG, Dan HAN, Fei-Fei TANG, Guo-Qiang XU, Xue-Cheng*   

  1. (Center of Functional Nanomaterials and Devices, Physics Department, East China Normal University, Shanghai 200062)
  • Received:2007-11-02 Revised:2008-04-01 Published:2008-10-28
  • Contact: XU, Xue-Cheng

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被引次数

22

从结构和相互作用方面对聚噻吩(PTh)/多壁碳纳米管(MWNTs)复合材料进行了研究, 结果表明: 一方面聚噻吩本身的结构对其导电性能有一定的影响, 另一方面MWNTs作为一种掺杂剂, 和聚噻吩之间存在强的相互作用, 电子从MWNTs转移到聚噻吩. MWNTs和它周围被掺杂的聚噻吩通过π-π共轭作用形成相对独立的导电单元, 在复合材料的导电体系中起到主要作用, 随着这种导电单元数量的增加直至相互接触, 形成大的导电体系, 复合材料的电导率达到最大值.

关键词: 聚噻吩, 碳纳米管, 导电机理, 电荷转移, 掺杂

Polythiophene (PTh)/multi-walled carbon nanotube (MWNT) composites were investigated on their structure and the interaction between PTh and MWNT. On one hand, the structure of PTh has an effective influence on the conductive properties of the composites. On the other hand, PTh is doped by MWNT. An intense interaction exists between MWNT and PTh when the electrons transfer from MWNT to PTh. MWNT can combine with the doped PTh via π-π system to form individual conductive units which play a critical role in the conducting system. With the increase of the conductive units, a larger conducting system is formed by conductive unit connection and the conductivity of composites reaches the maximum.

Key words: polythiophene, carbon nanotube, conducting mechanism, electron transfer, doping