Fractal Growth Kinetics and Electric Potential Oscillations during Electropolymerization of Pyrrole

被引：32

作者：

Das, Ishwar ^{[1
]}

Agrawal, Namita R. ^{[2
]}

Gupta, Sanjeev Kumar ^{[1
]}

Gupta, Sujeet Kumar ^{[1
]}

Rastogi, R. P. ^{[1
]}

机构：

[1] DDU Gorakhpur Univ, Dept Chem, Gorakhpur 273009, Uttar Pradesh, India

[2] St Andrews Coll, Gorakhpur 273009, Uttar Pradesh, India

来源：

JOURNAL OF PHYSICAL CHEMISTRY A | 2009年 / 113卷 / 18期

关键词：

CONDUCTING POLYMERS; ELECTROCHEMICAL PROPERTIES; POLYPYRROLE; ELECTRODEPOSITION; POLYMERIZATION; DIFFUSION; FILMS; FLOW;

D O I：

10.1021/jp8064147

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Fractal growth, growth kinetics, and electrical conductivity of aggregates obtained during electropolymerization in the systems (A) pyrrole-4-toluene sulfonic acid silver salt (4-TSS)-acetonitrile, (B) pyrrole-4-TSS-ZnSO(4)-acetonitrile, and (C) pyrrole-4-TSS-aniline-acetonitrile were investigated. In the case of system (A), effect of [4-TSS], [pyrrole], field intensity, and solvents H(2)O and CH(3)OH on morphology, fractal character, and growth kinetics was also studied. Fractal growth data were examined in detail. During studies on system (A), electric potential oscillations were observed and subjected to detailed study. The results indicate that fractal growth pattern and electric potential oscillations are inter-related. The mechanism of development of fractal growth, dendritic structure, and electric potential oscillations is discussed in terms of diffusion-limited aggregation and modified Diaz's mechanism, which explains the random movement of radical cations.

引用

页码：5296 / 5301

页数：6

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