Author: Katre Prachi P. Athawale Anjali A.
Publisher: Taylor & Francis Ltd
ISSN: 1553-3174
Source: Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry, Vol.37, Iss.5, 2007-06, pp. : 363-366
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Abstract
Gold nanoparticles were synthesized radiolatically in a 60Co γ-ray source. The sample solution containing aniline (stabilizer) and chloroauric acid was irradiated to a total dose of 198 kGy. 1:1 methanol-water system was used as a solvent. UV-Visible analysis of the sample confirmed the formation of gold nanoparticles exhibiting a sharp peak at a wavelength of ∼480 nm indicating the zero-valent state of gold. The solution showed a transition in color from colorless to purple. The stability of the nanosol extended up to a period of 96 h as investigated from the time-evolved spectra of the solution. 0.5 M concentration of the stabilizer is found to be optimum for yielding stable nanoparticles as revealed from the results obtained by varying the concentration of aniline from 0.05 M to 1.0 M. The nanocomposite of the gold nanoparticles was obtained by oxidative polymerization of aniline in presence of ammonium persulphate. Homogeneity of the nanocomposite was tested with the help of UV-Visible spectroscopy, XRD and TEM analysis. The bare gold nanoparticles showed narrow size distribution of the particles ranging from ∼10-12 nm.
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