The University of Southampton
University of Southampton Institutional Repository

An instrument for simultaneous EQCM impedance and SECM measurements

Gollas, B., Bartlett, P. N. and Denuault, G. (2000) An instrument for simultaneous EQCM impedance and SECM measurements Analytical Chemistry, 72, (2), pp. 349-356. (doi:10.1021/ac990796o).

Record type: Article

Abstract

A novel combination of an electrochemical quartz crystal microbalance (EQCM) and a scanning electrochemical microscope (SECM) has been built. Unlike conventional EQCMs, the instrument described here allows rapid in situ measurement of the modulus of the quartz crystal's transfer function. Data analysis in the complex plane for the Butterworth-Van Dyke (BVD) equivalent circuit yields the real and the imaginary components R (damping resistance) and XL (reactive inductance) of the crystal's electroacoustic impedance around its resonant frequency of 10 MHz, The influence of different tip shapes of an approaching microelectrode on the electroacoustic impedance of the quartz crystal was studied and found to be minimal for certain geometries, The capability of the EQCM/SECM instrument was tested in cyclic voltammetric plating/stripping experiments using a copper(I) chloride solution of high concentration in 1 M HCl, Four parameters, XL, R, the substrate, and the tip current, can be recorded simultaneously. Depletion layer effects were observed and could be corrected for to yield accurate current efficiencies for potentiodynamic and potentiostatic copper plating. The amperometric response of the SECM tip positioned closely to the substrate reflects the concentration changes of electroactive ions in the diffusion layer of the substrate electrode.

Full text not available from this repository.

More information

Published date: 15 January 2000
Keywords: quartz-crystal microbalance, scanning electrochemical microscopy, liquids, electrodes, generation, resonator, profile, waves, mass

Identifiers

Local EPrints ID: 18998
URI: http://eprints.soton.ac.uk/id/eprint/18998
ISSN: 0003-2700
PURE UUID: 56073401-657f-48c2-9c75-c3522edc6f53
ORCID for P. N. Bartlett: ORCID iD orcid.org/0000-0002-7300-6900
ORCID for G. Denuault: ORCID iD orcid.org/0000-0002-8630-9492

Catalogue record

Date deposited: 18 Jan 2006
Last modified: 17 Jul 2017 16:34

Export record

Altmetrics

Contributors

Author: B. Gollas
Author: P. N. Bartlett ORCID iD
Author: G. Denuault ORCID iD

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.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

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.

×