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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:
hr103@mtr.osakafu-u.ac.jp, Osaka Prefecture University, Nagara-nishi 2-3-22, Osaka, Kita, 531-0061, Japan
Taiei Hiroki
Affiliation:
am0804@mtr.osakafu-u.ac.jp, Japan
Fuminobu Hori
Affiliation:
horif@mtr.osakafu-u.ac.jp, Japan
Shuichi Okuda
Affiliation:
okuda@riast.osakafu-u.ac.jp, Japan
Ryoichi Taniguchi
Affiliation:
tan@riast.osakafu-u.ac.jp, Japan
Takao Kojima
Affiliation:
kojima@riast.osakafu-u.ac.jp, Japan
Tadashi Kambara
Affiliation:
kambara@rarfaxp.riken.jp, Japan
Tomoko Abe
Affiliation:
tomoabe@riken.jp, Japan
Akihiro Iwase
Affiliation:
iwase@mtr.osakafu-u.ac.jp, Japan
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Abstract

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.

Type
Research Article
Copyright
Copyright © Materials Research Society 2006

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References

1. Takatani, H., Kago, H., Nakanishi, M., Kobayashi, Y., Hori, F. and Oshima, R., Rev. Adv. Mater. Sci 5 (2003) 232238 Google Scholar
2. Nakanishi, M., Takatani, H., Kobayashi, Y., Hori, F., Taniguchi, R., Iwase, A. and Oshima, R., Applied Surface Science 241 (2005) 209212 CrossRefGoogle Scholar
3. Kinoshita, T., Seino, S., Otome, Y., Mizukoshi, Y., Nakagawa, T., Nakayama, T., Sekino, T. and Niihara, K., Mat. Res. Soc. Symp. Proc. 877E (2005) S6.30.1 Google Scholar

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