Mesoporous gold electrodes for sensors based on electrochemical double layer capacitance

No, C

Mesoporous gold electrodes for sensors based on electrochemical double layer capacitance

No, C

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Publisher:: Elsevier Science
Publication Type:: Journal Article
Citation:: No, C. 2007 'Mesoporous gold electrodes for sensors based on electrochemical double layer capacitance', Sensors And Actuators B-Chemical, vol. 123, no. 1, pp. 145-155.
Issue Date:: 2007

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Field	Value	Language
dc.contributor.author	No, C	en_US
dc.date.accessioned	2009-12-21T02:28:53Z
dc.date.available	2009-12-21T02:28:53Z
dc.date.issued	2007	en_US
dc.identifier	2006011475	en_US
dc.identifier.citation	No, C. 2007 'Mesoporous gold electrodes for sensors based on electrochemical double layer capacitance', Sensors And Actuators B-Chemical, vol. 123, no. 1, pp. 145-155.	en_US
dc.identifier.issn	0925-4005	en_US
dc.identifier.other	C1	en_US
dc.identifier.uri	http://hdl.handle.net/10453/3569
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 AuAlThe 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., 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.	en_US
dc.publisher	Elsevier Science	en_US
dc.relation.ispartof	Sensors And Actuators B-Chemical	en_US
dc.relation.hasversion	Accepted manuscript version	en_US
dc.relation.isbasedon	http://dx.doi.org/10.1016/j.survophthal.2006.12.007	en_US
dc.rights	NOTICE: this is the author’s version of a work that was accepted for publication in Survey of Ophthalmology. 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 Survey of Ophthalmology, [Volume 52, Issue 2, March–April 2007, Pages 145–155] DOI# http://dx.doi.org/10.1016/j.survophthal.2006.12.007	en_US
dc.title	Mesoporous gold electrodes for sensors based on electrochemical double layer capacitance	en_US
dc.type	Journal article
utslib.citation.volume	123	en_US
utslib.citation.number	1	en_US
utslib.location	New York, NY, USA	en_US
utslib.citation.startpage	145	en_US
utslib.citation.endpage	155	en_US
utslib.identifier.org	Chemistry, Materials and Forensic Sciences	en_US
utslib.copyright.status	open_access

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 AuAlThe 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., 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.

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