期刊
ANALYTICA CHIMICA ACTA
卷 537, 期 1-2, 页码 279-284出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2004.12.089
关键词
phase transfer; seed-mediated growth; core-shell; gold nanoparticle; ruthenium nanoparticle
The difference between the transfer of citrate-stabilized An and Ru nanoparticles from the aqueous phase to toluene was used to develop a simple experimental procedure that can positively identify the formation of bimetallic Au-Ru nanoparticles with the core-shell structure formed in the seed-mediated growth process. The procedure was independently verified by UV-vis spectroscopy, transmission electron microscopy (TEM), energy dispersive X-ray analysis (EDX) and X-ray photoelectron spectroscopy (XPS). The experimental results clearly showed that core-shell nanoparticles of Au-Ru were formed by the seed mediated growth method using Au nanoparticle seeds. The reverse order of using Ru nanoparticles as the seeds, on the contrary, could only produce a physical mixture of isolated nanoparticles of Ru and An under the same experimental conditions. (c) 2005 Elsevier B.V. All rights reserved.
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