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|Title:||Size and composition tunable Ag-Au alloy nanoparticles by replacement reactions|
|Authors:||Zhang, Q. |
|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. https://doi.org/10.1088/0957-4484/18/24/245605|
|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.|
|Appears in Collections:||Staff Publications|
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