Nucleation and growth mechanism of electroformation of polypyrrole on a heat-treated gold/highly oriented pyrolytic graphite

被引：56

作者：

Hwang, BJ ^{[1
]}

Santhanam, R ^{[1
]}

Lin, YL ^{[1
]}

机构：

[1] Natl Taiwan Univ Sci & Technol, Dept Chem Engn, Microelectrochem Lab, Sect 4, Taipei 106, Taiwan

来源：

ELECTROCHIMICA ACTA | 2001年 / 46卷 / 18期

关键词：

conducting polymers; polypyrrole; growth; nucleation; atomic force microscopy;

D O I：

10.1016/S0013-4686(01)00495-9

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Nucleation and growth mechanism of polypyrrole (PPy) films was investigated on vapor deposited gold/highly oriented pyrolytic graphite (Au/HOPG) after heat treatment by means of current-time transient (i-t) measurements and tapping mode atomic force microscopy. It was found that the nucleation and growth was a progressive 3-D before and after nuclei overlapping. However, the mechanism was 2-D instantaneous before nuclei overlapping and 3-D progressive after nuclei overlapping on a Au/HOPG substrate without heat treatment. The change in mechanism was due to lower surface defects on a heat-treated Au/HOPG substrate than on a bare Au/HOPG substrate. Images of PPy on a heat-treated Au/HOPG contained zig-zag and nodular structures. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：2843 / 2853

页数：11

共 37 条

[1]

[Anonymous], 1986, Handbook of Conducting Polymers

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