Issue 17, 2003
From the journal:

Physical Chemistry Chemical Physics

Multiple voltammetric waves for reductive desorption of cysteine and 4-mercaptobenzoic acid monolayers self-assembled on gold substrates

Kazuki Arihara,a   Takako Ariga,a   Noriko Takashima,a   Kayo Arihara,a   Takeyoshi Okajima,a   Fusao Kitamura,a   Koichi Tokudaa  and  Takeo Ohsaka*a  

* Corresponding authors

a Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, 4259, Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
E-mail: ohsaka@echem.titech.ac.jp

Abstract

The reductive desorption of cysteine and 4-mercaptobenzoic acid monolayers formed on polycrystalline and single-crystalline gold substrates has been investigated. Three cathodic waves observed at polycrystalline gold electrodes are correlated with reductive desorption from each small domain of the low index faces, i.e. (111), (100) and (110), over the surface. The stability of the adsorbates differs substantially depending on the surface crystallographic orientation, in the order (111) < (100) < (110). Thus, the reductive desorption occurs at certain potentials, leading to an apparent peak separation on their cyclic voltammograms. Partial desorption of the adsorbate via control of the potential would be a simple and reliable method of fabricating functional electrodes designed for use as electrocatalysts or sensors, on which only the small domains of the (111) face could be selectively exposed to an electrolyte.

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Article information

DOI
https://doi.org/10.1039/B305867K
Article type
Paper
Submitted
27 May 2003
Accepted
15 Jul 2003
First published
04 Aug 2003

Phys. Chem. Chem. Phys., 2003,5, 3758-3761

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Multiple voltammetric waves for reductive desorption of cysteine and 4-mercaptobenzoic acid monolayers self-assembled on gold substrates

K. Arihara, T. Ariga, N. Takashima, K. Arihara, T. Okajima, F. Kitamura, K. Tokuda and T. Ohsaka, Phys. Chem. Chem. Phys., 2003, 5, 3758 DOI: 10.1039/B305867K

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