Voltammetric characterisation of silicon-based microelectrode arrays and their application to mercury-free stripping voltammetry of copper ions

This paper describes the electrochemical characterisation of a range of gold and platinum microelectrode arrays (MEAs) fabricated by standard photolithographic methods. The inter-electrode spacing, geometry, numbers and dimensions of the electrodes in the arrays were found to influence the voltammet...

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Bibliographic Details
Published in:Talanta (Oxford) 2007-02, Vol.71 (3), p.1022-1030
Main Authors: Berduque, Alfonso, Lanyon, Yvonne H., Beni, Valerio, Herzog, Grégoire, Watson, Yvonne E., Rodgers, Kenneth, Stam, Frank, Alderman, John, Arrigan, Damien W.M.
Format: Article
Language:English
Subjects:
Analytical chemistry
Chemistry
Electrochemical methods
Exact sciences and technology
Metal ion detection
Micro-square and micro-band electrodes
Microelectrode array
Stripping voltammetry
Voltammetry
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Summary:This paper describes the electrochemical characterisation of a range of gold and platinum microelectrode arrays (MEAs) fabricated by standard photolithographic methods. The inter-electrode spacing, geometry, numbers and dimensions of the electrodes in the arrays were found to influence the voltammetric behaviours obtained. Excellent correlation was found between experimental data and theoretical predictions employing published models of microelectrode behaviour. Gold MEAs were evaluated for their applicability to copper determination in a soil extract sample, where agreement was found between the standard analytical method and a method based on underpotential deposition—anodic stripping voltammetry (UPD-ASV) at the MEAs, offering a mercury-free alternative for copper sensing.
ISSN:0039-9140
1873-3573
1873-3573
DOI:10.1016/j.talanta.2006.05.090