Mesoporous gold electrodes for sensors based on electrochemical double layer capacitance

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dc.contributor.author Mortari, A
dc.contributor.author Maaroof, A
dc.contributor.author Martin, D
dc.contributor.author Cortie, MB
dc.date.accessioned 2009-06-26T04:10:53Z
dc.date.issued 2007-04-10
dc.identifier.citation Sensors and Actuators, B: Chemical, 2007, 123 (1), pp. 262 - 268
dc.identifier.issn 0925-4005
dc.identifier.other C1 en_US
dc.identifier.uri http://hdl.handle.net/10453/588
dc.description.abstract The use of mesoporous gold as electrode material for measurement of electrochemical capacitance is investigated. The electrodes possess a pore size in the range of 10-30 nm and are prepared by de-alloying films of AuAlx, where x ≥ 2. Analyses conducted with X-ray photoelectron spectra (XPS) show that their surfaces are essentially pure gold, with only traces of aluminium remaining. The electrodes show near-ideal capacitor behaviour under both cyclic voltammetry and potential-step conditions. The higher capacitance of the mesoporous electrodes leads to a better dynamic range in potential-step experiments, resulting in improved accuracy of measurement. The sensitivity of the new material as a capacitive sensor is demonstrated in a milk fouling experiment, and is improved by up to 30 times compared to the control sample of ordinary planar gold. We propose that the use of mesoporous gold electrodes offers a convenient way to sensitively and accurately amplify the capacitance signal of an electrochemical sensor. © 2006 Elsevier B.V. All rights reserved.
dc.language eng
dc.relation.hasversion Accepted manuscript version en_US
dc.relation.isbasedon 10.1016/j.snb.2006.08.018
dc.rights NOTICE: this is the author’s version of a work that was accepted for publication in Sensors and Actuators B: Chemical. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Sensors and Actuators B: Chemical, [Volume 123, Issue 1, 10 April 2007, Pages 262–268] DOI# http://dx.doi.org/10.1016/j.snb.2006.08.018 en_US
dc.title Mesoporous gold electrodes for sensors based on electrochemical double layer capacitance
dc.type Journal Article
dc.parent Sensors and Actuators, B: Chemical
dc.journal.volume 1
dc.journal.volume 123
dc.journal.number 1 en_US
dc.publocation Switzerland en_US
dc.identifier.startpage 262 en_US
dc.identifier.endpage 268 en_US
dc.cauo.name SCI.Physics and Advanced Materials en_US
dc.conference Verified OK en_US
dc.for 0306 Physical Chemistry (Incl. Structural)
dc.for 0301 Analytical Chemistry
dc.personcode 960727
dc.personcode 020302
dc.personcode 010727
dc.percentage 67 en_US
dc.classification.name Physical Chemistry (incl. Structural en_US
dc.classification.type FOR-08 en_US
dc.description.keywords double layer capacitance, capacitive sensor, mesoporous gold, nanoporous gold en_US
dc.description.keywords double layer capacitance, capacitive sensor, mesoporous gold, nanoporous gold
dc.description.keywords Accuracy
dc.description.keywords Capacitive sensor
dc.description.keywords Double layer capacitance
dc.description.keywords Mesoporous gold
dc.description.keywords Nanoporous gold
dc.description.keywords Sensitivity
dc.description.keywords Accuracy
dc.description.keywords Capacitive sensor
dc.description.keywords Double layer capacitance
dc.description.keywords Mesoporous gold
dc.description.keywords Nanoporous gold
dc.description.keywords Sensitivity
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
pubs.organisational-group /University of Technology Sydney/Faculty of Science/School of Medical and Molecular Sciences
pubs.organisational-group /University of Technology Sydney/Strength - Health Technologies


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