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Synthesis of Au Nano-particles under Energetic Irradiation Fields

Published online by Cambridge University Press:  01 February 2011

Nobuhiro Maeda
Affiliation:, Osaka Prefecture University, Nagara-nishi 2-3-22, Osaka, Kita, 531-0061, Japan
Taiei Hiroki
Affiliation:, Japan
Fuminobu Hori
Affiliation:, Japan
Shuichi Okuda
Affiliation:, Japan
Ryoichi Taniguchi
Affiliation:, Japan
Takao Kojima
Affiliation:, Japan
Tadashi Kambara
Affiliation:, Japan
Tomoko Abe
Affiliation:, Japan
Akihiro Iwase
Affiliation:, Japan
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Dilute aqueous solutions with Au3+ ions and Polyethylene Glycol Monostearate are irradiated with ∼1 MeV γ-ray from 60Co source, 10 MeV pulsed electrons or 1.6 GeV carbon ions. After the irradiation, the color of solutions changes from buff yellow to reddish color. The UV-vis absorption spectra show that after the irradiation, light absorption around 530 nm appears, which corresponds to the excitation of the surface plasmon due to Au nano-particles. The result confirms that the irradiation reduces Au3+ ions in the aqueous solutions and synthesizes Au nano-particles. Size and shape of the nano-particles are examined by using 200kV transmission electron microscope. Effects of irradiation parameters (total dose and dose rate) on Au nano-particle synthesis are discussed.

Research Article
Copyright © Materials Research Society 2006

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