Yang J, Lee JY, Chen LX, Too HP. A Phase-Transfer Identification of Core−Shell Structures in Ag−Pt Nanoparticles.
J Phys Chem B 2005;
109:5468-72. [PMID:
16851583 DOI:
10.1021/jp045994k]
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Abstract
Ag-Pt nanoparticles with a confirmed core-shell structure could only be formed by the successive reduction method using Ag nanoparticles as the seeds. The core-shell structure could be conveniently inferred from the transferability of the particles from water to toluene. Independent measurements by UV-vis spectroscopy, transmission electron microscopy, energy-dispersive X-ray analysis, and X-ray photoelectron spectroscopy were used to validate the experimental results. The reverse order of synthesis using Pt nanoparticles as the seeds did not result in any core-shell product. Instead a physical mixture of Ag nanoparticles and the original Pt seeds was obtained under the same experimental conditions.
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