Electrochemical study of anomalous diffusion and fractal dimension in poly ortho aminophenol electroactive film: Comparative study

被引：54
作者：
Ehsani, A. [1 ]
Mahjani, M. G. [2 ]
Bordbar, M. [1 ]
Adeli, S. [2 ]
机构：
[1] Univ Qom, Fac Sci, Dept Chem, Qom, Iran
[2] KN Toosi Univ Technol, Fac Sci, Dept Chem, Tehran, Iran
来源：
JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2013年 / 710卷
关键词：
Conducting polymer; Diffusion coefficients; Fractal; Impedance; Anomalous; CONDUCTING POLYMERS; IMPEDANCE; ELECTRODE; ADSORPTION; SURFACES; KINETICS;
D O I：
10.1016/j.jelechem.2013.01.008
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The poly ortho aminophenol (POAP) films were electropolymerised on graphite electrode using potentiostatic method. POAP films were also characterized by electrochemical impedance spectroscopy (EIS) in wide frequency range. The fractal dimension of poly ortho aminophenol (POAP) films in the presence of different counter ions was investigated. The effect of different anions on the electron conduction of POAP was explained in terms of their abilities to reduce repulsive interactions between redox sites and fractal dimension of the polymer. Diffusion coefficient of counter ions calculated from the slope of the Warburg line of impedance response of the film. A value of gamma that is the characteristic of anomalous diffusion is obtained by EIS method and then the relation between fractal dimension and anomalous diffusion has been investigated. The resulting Mott-Schottky plot of the polymer capacitance describes the reduced polymer as a p-type semiconductor. (C) 2013 Elsevier B.V. All rights reserved.
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页码：29 / 35
页数：7
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