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Citation: CAI Cheng-Dong, ZHOU Jian-Zhang, QI Li, XI Yan-Yan, LAN Bi-Bo, WU Ling-Ling, LIN Zhong-Hua. Conductance of a Single Conducting Polyaniline Nanowire[J]. Acta Physico-Chimica Sinica, ;2005, 21(04): 343-346. doi: 10.3866/PKU.WHXB20050401 shu

Conductance of a Single Conducting Polyaniline Nanowire

1.
State Key Laboratory of Physical Chemistry of the Solid Surface，Department of Chemistry，College of Chemistry and Chemical Engineering，Institute of Physical Chemistry，Xiamen University，Xiamen 361005

Received Date: 30 December 2004
Available Online: 15 April 2005

The combination of template synthesis method of nanowire/nanotube and conductive atomic force microscopy (C-AFM) is an efficient way that can be used to probe the conductivity of single one-dimension nanomaterial and its array. This communication reports the conductivity of an electrochemically prepared single polyaniline (PANI) nanowire determined using C-AFM and dependences of the conductivity on its diameter and redox state. Our preliminary results of measured current-voltage curves show that the volt-ampere characteristic is similar to that of semiconductor, except that reverse breakdown characteristic has not been observed in the bias range of our test. The possible reason is that the conducting partial oxidized state is reduced into insulating reduced state under the applied reverse bias. The conductivity is lineally increased while the decrease of the diameter of nanowire. Meanwhile, the conductivity of oxidized state and reduced state doped with ClO₄^－ ion is lower than that of partial oxidized state by two order of magnitude.
- Polyaniline; Single nanowire; C-AFM; Conductivity
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