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Preparatin of Ag, Pd, and Pt50-Ru50 colloids prerared by r-irradiation and electron beam and electrochemical immobilization on gold surface
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2006, v.19 no.4, pp.333-341
&
A.Gopalan,
(2006). Preparatin of Ag, Pd, and Pt50-Ru50 colloids prerared by r-irradiation and electron beam and electrochemical immobilization on gold surface. Analytical Science and Technology, 19(4), 333-341.
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Abstract
PVP-protected Ag, Pd and <TEX>$Pt_{50}-Ru_{50}$</TEX> colloids were prepared independently by using <TEX>${\gamma}$</TEX>-irradiation and electron beam (EB) at ambient temperature. UV-visible spectra of these colloids show the characteristic bands of surface resonance and give evidence for the formation of nanoparticles. Transmission electron microscopy (TEM) experiments were used to know the morphology of nanoparticles prepared by <TEX>${\gamma}$</TEX>-irradiation and EB. The size of Ag, Pd, and <TEX>$Pt_{50}-Ru_{50}$</TEX> nanoparticles prepared by <TEX>${\gamma}$</TEX>-irradiation was ca. 13, 2-3, 15 nm, respectively. While, the size of Ag, Pd, and <TEX>$Pt_{50}-Ru_{50}$</TEX> nanoparticles prepared by EB was ca. 10, 6, and 1-3 nm, respectively. Cyclic voltamograms (CV) were recorded for the Au electrodes immobilized with these nanoparticles. CVs indicated the modifications in the surface as a result of immobilization.
- keywords
- <TEX>${\gamma}$</TEX>-Irradiation, Electron beam, Ag colloids, Pd colloids, <TEX>$Pt_{50}-Ru_{50}$</TEX> colloids, Cyclic voltammetry
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