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ID 23377
file
creator
Kishimoto, Kazuya
Mizota, Haruo
subject
conformation
kinetics
reflection
polyaniline
scattering
NDC
Chemistry
abstract
Light reflection at polymer-coated electrodes is studied for polyaniline, poly(o-methylaniline), and poly(o-methoxyaniline). Reflected light intensity is found to be affected greatly by the applied potential for the two reasons: one is absorption of light due to coloring of the oxidized polymer film and the other is light scattering which is concerned with a polymer chain conformation upon oxidation. A new method based on the potential dependence of light reflection is proposed for studying kinetics of conformational changes of polymer chains. The rate constants evaluated are in the range of 0.05-8 s-1 at room temperature, depending on the sort of polymers, the film thickness, and pH of the solution. Irrespective of the sort of polymers, the increase in film thickness or solution pH leads to the decrease of the rate constant. It is found that a film morphology has a significant effect on the rate constant, as confirmed by a comparison of rate constants observed with polyaniline films grown at different rates.
journal title
Electrochimica Acta
volume
Volume 53
issue
Issue 2
start page
657
end page
663
date of issued
2007-12
publisher
Elsevier Ltd.
issn
0013-4686
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
author
rights
Copyright (c) 2007 Elsevier Ltd.
relation is version of URL
http://dx.doi.org/10.1016/j.electacta.2007.07.033
department
Graduate School of Engineering