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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received April 30, 2005
Accepted December 16, 2005

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Radiolytic synthesis of Pd-M (M=Ag and Ni) and Pt-M (M=Ru and Ni) alloy colloids

Sang-Jun Kim Seong-Dae Oh Seong-Ho Choi^† Anantha Iyengar Gopalan¹ Kwang-Pill Lee¹ Hee-Dong Kang² Chang-Ho Shin³

Department of Chemistry, Hannam University, 133, Ojeng-dong, Daeduck-gu, Daejeon 306-791, Korea ¹Department of Chemistry Graduate School, Kyungpook National University, Daegu 702-701, Korea ²Department of Chemistry Graduate School, Department of Physics, Daegu 702-701, Korea ³KT&G Central Research Institute, 302, Sinseong-dong, Yuseong-gu, Daejeon 305-345, Korea

shchoi@hannam.ac.kr

Korean Journal of Chemical Engineering, May 2006, 23(3), 488-495(8), 10.1007/BF02706754

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Abstract

Pd-M (M=Ag and Ni) and Pt-M (Ru and Ni) alloy colloids were successfully prepared in aqueous solution by γ-irradiation using poly(vinylpyrrolidone), PVP, as stabilizer. The PVP-stabilized Pd-M and Pt-M nanoparticles were characterized by UV-Vis spectroscopy, Transmission Electron Microscopy (TEM) and Electrophoretic Light Scattering (ELS) analysis. The influence of molecular size of the PVP on the size and size distribution of the alloy nanoparticles was followed. Pd-Ag nanoparticles were formed by employing PVP with different molecular weights. The size of Pd-Ag alloy nanoparticles was determined by TEM photograph and ELS spectra, respectively. From the TEM photographs, the average diameter of Pd-Ag nanoparticles does not show strong dependence on the molecular weight of the PVP. On the other hand, the average diameter of Pd-Ag alloy colloids prepared by PVP with Mw=40,000 was consistently larger than that of Pd-Ag alloy colloids prepared by PVP with Mw=10,000. A plausible scheme is given to explaining this. The size and size distribution of Pt-M (Ru and Ni) alloy colloids are presented.

Keywords

γ-Irradiation Pd-Ag Alloy Colloids Pd-Ni Alloy Colloids Pt-Ru Alloy Colloids Pt-Ni Alloy Colloids Poly(vinylpyrrolidone)

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