NDLI: Voltammetric potentials of polyaniline varying with electric percolation

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Voltammetric potentials of polyaniline varying with electric percolation

Content Provider	Semantic Scholar
Author	Chen, Han Aoki, Koichi Jeremiah Chen, Jingyuan
Copyright Year	2011
Abstract	The reduction of the emeraldine form of polyaniline film into leucoemeraldine, which corresponds to the conversion of an electric conductor into an insulator, shifted in the positive direction with increasing scan rate and film thickness. Similar dependence was found in the diffusion-controlled voltammograms of dispersed polyaniline latex particles with eight diameters ranging from 0.2 to 7.5 μm. The particles were synthesized by coating dispersed polystyrene latex with polyaniline. These variations were explained in terms of electric percolation of the conducting species to the electrode. The theoretical expression for the Nernst equation was derived on the assumption that the percolated and the un-percolated conducting species took inner potentials of the electrode and the solution phase, respectively. The conducting species does not participate in the determination of the equilibrium potential, though it participates in the Faradaic current. The cathodic peak potential shifted in the negative direction with an increase in particle size, solution viscosity, and film thickness, as predicted from the derived Nernst equation. keywords: polyaniline films; electric percolation; Nernst equation; latex suspensions; conducting species. * phone +81 090 8095 1906, fax +81 776 27 8750, e-mail kaoki@u-fukui.ac.jp
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://repo.flib.u-fukui.ac.jp/dspace/bitstream/10098/3205/1/Electrochimica%20Acta55.pdf
Language	English
Access Restriction	Open
Subject Keyword	Action potential Behavior Coating Excipient Diameter (qualifier value) Email Fax Horizontal scan rate LaTeX Oxygen 100 % Gas for Inhalation Percolation theory Polystyrenes Suspensions Thickness (graph theory) Topological insulator polyaniline
Content Type	Text
Resource Type	Article

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