A phase transfer identification of core-shell structures in Au-Ru nanoparticles

作者：Yang J; Lee JY^*; Too HP

来源：Analytica Chimica Acta, 2005, 537(1-2): 279-284.

DOI：10.1016/j.aca.2004.12.089

• 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.

• 出版日期2005-4-29
• 单位MIT