Radiolytic synthesis of Pd-M (M=Ag and Ni) and Pt-M (M=Ru and Ni) alloy colloids |
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Authors: | Sang-Jun Kim Seong-Dae Oh Seong-Ho Choi Anantha Iyengar Gopalan Kwang-Pill Lee Hee-Dong Kang Chang-Ho Shin |
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Affiliation: | (1) Department of Chemistry, Hannam University, 133, Ojeng-dong, Daeduck-gu, 306-791 Daejeon, Korea;(2) Department of Chemistry Graduate School, Kyungpook National University, 702-701 Daegu, Korea;(3) Department of Physics, Kyungpook National University, 702-701 Daegu, Korea;(4) KT&G Central Research Institute, 302, Sinseong-dong, Yuseong-gu, 305-345 Daejeon, Korea |
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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. |
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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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