Mesoporous gold electrodes for sensors based on electrochemical double layer capacitance

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Show simple item record Mortari, A Maaroof, A Martin, D Cortie, MB 2009-06-26T04:10:53Z 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.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.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 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 Physical Chemistry (incl. Structural en_US
dc.classification.type FOR-08 en_US
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
utslib.copyright.status Closed Access 2015-04-15 12:23:47.074767+10
pubs.consider-herdc true
utslib.collection.history General (ID: 2)

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