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- W2317123354 abstract "Elemental metal nanoparticles are widely used to catalyze semiconductor nanowire growth, but size-controlled alloy nanoparticles have not been explored in this context. We present a simple aqueous synthesis of Au−Cu2O core−shell nanoparticles to produce Au−Cu alloy nanoparticles of controlled size and composition by vacuum annealing. Colloidal Au nanoparticles were used as size-controlled seeds, and fine control of the Cu2O shell thickness enabled tuning of the average Au−Cu alloy composition. The alloy nanoparticles were found to catalyze Ge nanowire growth in a low-pressure chemical vapor deposition environment. The nanowire growth rate for Au−Cu nanoparticles was intermediate to that of Cu (slowest) and Au (fastest) nanoparticles under identical conditions, suggesting a vapor−solid−solid growth process. These catalysts provide a useful platform to explore the influence of catalyst phase and chemistry on nanowire growth mechanisms that determine important variables including the doping rate and junction abruptness." @default.
- W2317123354 created "2016-06-24" @default.
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- W2317123354 date "2010-11-12" @default.
- W2317123354 modified "2023-09-25" @default.
- W2317123354 title "Growth of Ge Nanowires from Au−Cu Alloy Nanoparticle Catalysts Synthesized from Aqueous Solution" @default.
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- W2317123354 doi "https://doi.org/10.1021/jz101436a" @default.
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