Synthesis and Properties of Co/Au and Ni/Au Nanoparticles with Core/Shell Structure
YU. A. ZAKHAROV1,2, N. K. EREMENKO2, V. G. DODONOV1, I. I. OBRAZTSOVA2, A. N. EREMENKO2
1Kemerovo State University, Ul. Krasnaya 6, Kemerovo 650043 (Russia)
2Institute of Coal Chemistry and Material Science, Siberian Branch of the Russian Academy of Sciences, Pr. Sovetskiy 18, Kemerovo 650000 (Russia)
Keywords: metal nanoparticles, synthesis, core/shell systems, Co/Au, Ni/Au
Abstract
Nanoparticles of bimetal systems Co/Au and Ni/Au were synthesized in aqueous medium on the basis of reduction - electrochemical substitution of metals. The core/shell structure was confirmed by means of transmission electron microscopy, optical spectroscopy in the visible region, and small-angle X-ray scattering (SAS). Using the SAS curves, the mass functions of nonuniformity size distribution were calculated in the approximations of uniform spherical particles and core/shell structures. It was shown that the structure of particles is adequately described within the core/shell spherical model. On the basis of the analysis of particle size distribution profiles within this mode, the size and morphological parameters of Co/Au, Ni/Au particles were estimated.
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