Acta Chimica Sinica ›› 2011, Vol. 69 ›› Issue (04): 477-482. Previous Articles     Next Articles

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  1. (高分子合成与功能构造教育部重点实验室 浙江大学高分子科学与工程学系 杭州 310027)
  • 投稿日期:2010-04-08 修回日期:2010-09-17 发布日期:2010-10-21
  • 通讯作者: 陈红征
  • 基金资助:


Electrochemically Synthesized Polypyrrole Coatings and Their Effect on Electrical Properties of Neural Microelectrode

DENG Meng, WANG Mang, CHEN Hong-Zheng   

  1. (MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027)
  • Received:2010-04-08 Revised:2010-09-17 Published:2010-10-21

A series of conducting polypyrrole (PPy) coatings with different thickness and morphology were electrochemically synthesized on neural microelectrodes. The chemical component and morphology of PPy coatings were characterized by X-ray photoelectron spectroscopy and scanning electron microscope. The effect of PPy coatings on electrical properties of neural microelectrode was further studied. Electrochemical impedance spectroscopy of neural microelectrodes before and after PPy coating indicated that the neural microelectrode s impedance after PPy coating dropped to 1/55 of that without PPy coating. Cyclic voltammograms showed that the electric capacity of neural microelectrode with PPy coating was evidently increased with a longer reaction time or a higher current density within a range.

Key words: polypyrrole, neural microelectrode, electrochemical impedance spectroscopy, cyclic voltammetry