Mesoporous Gold Sponge
Michael B. Cortie A B , Abbas I. Maaroof A , Nicholas Stokes A and Alessia Mortari AA Institute for Nanoscale Technology, University of Technology, Sydney, Broadway, NSW 2007, Australia.
B Corresponding author. Email: michael.cortie@uts.edu.au
Australian Journal of Chemistry 60(7) 524-527 https://doi.org/10.1071/CH06372
Submitted: 13 October 2006 Accepted: 6 March 2007 Published: 9 July 2007
Abstract
Mesoporous gold sponge may be prepared by the removal of aluminium from AuAl2 by an alkaline leach. The resulting material has nanoscale pores and channels, with a high specific surface area that can be exploited in electrochemical applications. For example, the material may serve as the basis of a more sensitive capacitive sensor or biosensor, as an electrode material for a high efficiency ultracapacitor, as the semi-transparent current collector in a dye sensitized photovoltaic cell, or as the lithium storage electrode in a lithium ion cell. The properties of the sponge may be controlled by varying its density, pore size, and pore size distribution, factors which are in turn controlled by the microstructure of the precursor compound and the conditions of deposition.
Acknowledgments
We thank to the World Gold Council and the University of Technology, Sydney, for financial support.
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