Journal
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
Volume 600, Issue 1, Pages 95-102Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2006.03.024
Keywords
self-assembled monolayer; polyaniline-analogue; capacitance
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A method is developed to estimate the coverage of an electropolymerizable aniline-analogue monolayer (mixture of 2- and 3-aminophenols, 2/3-ATP) by measuring the charge capacitance of the electrode (theta = 81%). The technique of filling the uncovered area (defect sites) of the aniline-analogue monolayer with alkanethiols with long alkane chains (1-decanethiol, 1-DT) has been used to determine the coverage. The dielectric constant (permittivity) of the PANI-analogue monolayer was determined to 8.4. Adsorption kinetics of 1-DT was also studied, and the value of the rate constant of the secondary adsorption was measured to 0.9 mol(-1) dm(3) s(-1). (c) 2006 Elsevier B.V. All rights reserved.
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