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- W2909960037 abstract "We report the defect-assisted deposition of Au on Ag nanocubes for the generation of Ag@Au core–shell nanocubes with three to eight atomic layers. In a standard protocol, we disperse Ag nanocubes in an ethylene glycol (EG) solution containing poly(vinylpyrrolidone) and then titrate aqueous HAuCl4 at 110 °C. Initially, the galvanic replacement reaction between HAuCl4 and Ag allows the deposition of Au on the edges of the nanocubes with highest surface energy as the Ag atoms on the side faces are dissolved into the aqueous suspension in the form of Ag(I) ions to create surface defects. These defects then become preferential sites for the codeposition of Ag and Au atoms derived from the coreduction of both the Ag(I) and Au(III) ions in the reaction solution by EG. Once the defect sites have been filled, the additional Ag and Au atoms will rapidly diffuse across the entire surface of each nanocube for the generation of a nanocube with a relatively thin shell made of a Ag–Au alloy. Afterward, the chemical redu..." @default.
- W2909960037 created "2019-01-25" @default.
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- W2909960037 date "2019-01-14" @default.
- W2909960037 modified "2023-09-25" @default.
- W2909960037 title "Defect-Assisted Deposition of Au on Ag for the Fabrication of Core–Shell Nanocubes with Outstanding Chemical and Thermal Stability" @default.
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- W2909960037 doi "https://doi.org/10.1021/acs.chemmater.8b04723" @default.
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