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Title: Size and composition tunable Ag-Au alloy nanoparticles by replacement reactions
Authors: Zhang, Q. 
Lee, J.Y. 
Yang, J.
Boothroyd, C.
Zhang, J. 
Issue Date: 10-Jun-2007
Citation: Zhang, Q., Lee, J.Y., Yang, J., Boothroyd, C., Zhang, J. (2007-06-10). Size and composition tunable Ag-Au alloy nanoparticles by replacement reactions. Nanotechnology 18 (24) : -. ScholarBank@NUS Repository.
Abstract: Ag-Au alloy nanoparticles with tunable size and composition were prepared by a replacement reaction between Ag nanoparticles and HAuCl4 at elevated temperatures. The formation of homogeneous alloy nanoparticles was confirmed by selected-area energy-dispersive x-ray spectroscopy (SAEDX), UV-visible absorption spectroscopy, high resolution transmission electron microscopy (HRTEM) and electron diffraction. This method leverages upon the rapid interdiffusion of Ag and Au atoms in the reduced dimension of a nanoparticle, elevated temperatures and the large number of vacancy defects created in the replacement reaction. This method of preparation has several notable advantages: (1) independent tuning of the size and composition of alloy nanoparticles; (2) production of alloy nanoparticles in high concentrations; (3) general utility in the synthesis of alloy nanoparticles that cannot be obtained by the co-reduction method. © IOP Publishing Ltd.
Source Title: Nanotechnology
ISSN: 09574484
DOI: 10.1088/0957-4484/18/24/245605
Appears in Collections:Staff Publications

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