Evaluation of coverage of self-assembled polyaniline-analogue monolayer by capacitance measurements



: Niu L, Kvarnstrom C, Ivaska A

Publisher: ELSEVIER SCIENCE SA

: 2007

Journal of Electroanalytical Chemistry and Interfacial Electrochemistry

JOURNAL OF ELECTROANALYTICAL CHEMISTRY

: J ELECTROANAL CHEM

: 600

: 1

: 95

: 102

: 8

: 0022-0728

DOI: https://doi.org/10.1016/j.jelechem.2006.03.024


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.



Last updated on 2025-14-10 at 09:59