Electrical conductivity of individual polypyrrole microtube
Long Yun-Ze (龙云泽)a, Xiao Hong-Mei (肖红梅)bc, Chen Zhao-Jia (陈兆甲)a, Wan Mei-Xiang (万梅香)b, Jin Ai-Zi (金爱子)d, Gu Chang-Zhi (顾长志)d
a Key Laboratory of Extreme Conditions Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; b Laboratory of Organic Solids, Centre for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China; c School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China; d Laboratory of Microfabrication, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
Abstract Conducting microtubes (0.4－0.5μm in outer diameter) made of polypyrrole (PPy) doped with p-toluene sulfonic acid (PTSA) were synthesized by a self-assembly method. We report the electrical conductivity of an individual PPy microtube, on which a pair of platinum micro-leads was fabricated by focused ion beam deposition. The measured room-temperature conductivity of the individual PPy microtube was 0.29S/cm, which is comparable to that of template-synthesized PPy micro/nanotubes. The temperature dependence of conductivity of the individual microtube follows the three-dimensional variable-range hopping (3D VRH) model.
Received: 13 February 2004
Revised: 08 April 2003
Accepted manuscript online:
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