The University of Southampton
University of Southampton Institutional Repository

Scanning electrochemical microscopy: potentiometric probing of ion fluxes

Denuault, G., Frank, M.H.T. and Peter, L.M. (1992) Scanning electrochemical microscopy: potentiometric probing of ion fluxes Faraday Discussions, (94), pp. 23-35. (doi:10.1039/FD9929400023).

Record type: Article


The scanning electrochemical microscope has been used to probe the diffusion layer by measuring the potential difference between a large reference electrode located in the bulk of the solution and a microindicator electrode positioned a few mum away from a substrate electrode. Ag micro-discs (10 and 50 mum diameter) have been used as potentiometric sensors to probe the concentration profile due to the diffusion of Ag+ to and from a planar Ag electrode. A similar experiment was carried out with an Ag microcylinder (50 mum diameter) as substrate electrode. In a separate set of experiments, Ag/AgCl microdiscs (10 and 50 mum diameter) were used to monitor the flux of Cl- consumed and generated by a film of polyaniline electrodeposited on Pt. The tip potential was recorded while cycling the potential of the PANI film past the first oxidation peak. Direct measurement of the ingress and egress of Cl- ions supports previously reported mechanisms for the oxidation of PANI films.

Full text not available from this repository.

More information

Published date: 1992
Additional Information: MA449
Keywords: diffusion layer, beam deflection, microelectrode probe, polyaniline, behavior, ph, voltammetry, resolution, electrodes, reduction


Local EPrints ID: 179275
ISSN: 0301-7249
PURE UUID: a7603ef1-982a-4f42-a93c-427e710d6f0b
ORCID for G. Denuault: ORCID iD

Catalogue record

Date deposited: 08 Apr 2011 08:42
Last modified: 18 Jul 2017 12:03

Export record



Author: G. Denuault ORCID iD
Author: M.H.T. Frank
Author: L.M. Peter

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton:

ePrints Soton supports OAI 2.0 with a base URL of

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.