Optical: In situ study of de-alloying kinetics in nanoporous gold sponges

Tai, MC; Gentle, A; Arnold, MD; Cortie, MB

Optical: In situ study of de-alloying kinetics in nanoporous gold sponges

Tai, MC

Gentle, A

Arnold, MD

Cortie, MB

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Publication Type:: Journal Article
Citation:: RSC Advances, 2016, 6 (89), pp. 85773 - 85778
Issue Date:: 2016-01-01

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Field	Value	Language
dc.contributor.author	Tai, MC https://orcid.org/0000-0002-3885-0743	en_US
dc.contributor.author	Gentle, A https://orcid.org/0000-0001-8964-0722	en_US
dc.contributor.author	Arnold, MD https://orcid.org/0000-0003-4164-0242	en_US
dc.contributor.author	Cortie, MB https://orcid.org/0000-0003-3202-6398	en_US
dc.date.issued	2016-01-01	en_US
dc.identifier.citation	RSC Advances, 2016, 6 (89), pp. 85773 - 85778	en_US
dc.identifier.uri	http://hdl.handle.net/10453/117967
dc.description.abstract	© 2016 The Royal Society of Chemistry. Nanoporous gold sponges are useful for a variety of applications but the kinetics of the dissolution process used to make them is not well understood. Here we show how optical transmittance can be used to determine the rate at which sponges form from thin film precursors. The technique also provides a means by which de-alloying can be terminated at a target thickness. Analysis revealed three stages during the de-alloying process: initial depassivation, bulk dissolution and, finally, delamination. The dissolution rate is linear with hydroxide concentration, and exponential with temperature, with an activation energy of approximately 0.5 eV.	en_US
dc.relation	http://purl.org/au-research/grants/arc/DP140102003
dc.relation.ispartof	RSC Advances	en_US
dc.relation.isbasedon	10.1039/c6ra18272k	en_US
dc.title	Optical: In situ study of de-alloying kinetics in nanoporous gold sponges	en_US
dc.type	Journal Article
utslib.citation.volume	89	en_US
utslib.citation.volume	6	en_US
utslib.for	0205 Optical Physics	en_US
utslib.for	0306 Physical Chemistry (incl. Structural)	en_US
utslib.for	03 Chemical Sciences	en_US
pubs.embargo.period	Not known	en_US
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 Mathematical and Physical Sciences
utslib.copyright.status	open_access
pubs.issue	89	en_US
pubs.publication-status	Published	en_US
pubs.volume	6	en_US

Abstract:

© 2016 The Royal Society of Chemistry. Nanoporous gold sponges are useful for a variety of applications but the kinetics of the dissolution process used to make them is not well understood. Here we show how optical transmittance can be used to determine the rate at which sponges form from thin film precursors. The technique also provides a means by which de-alloying can be terminated at a target thickness. Analysis revealed three stages during the de-alloying process: initial depassivation, bulk dissolution and, finally, delamination. The dissolution rate is linear with hydroxide concentration, and exponential with temperature, with an activation energy of approximately 0.5 eV.

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http://hdl.handle.net/10453/117967