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X-ray Absorption Fine Structure Study on Coordination State of Implanted Gold Ions in Silica Glass

Published online by Cambridge University Press:  31 January 2011

Kohei Fukumi
Affiliation:
Osaka National Research Institute, AIST, 1–8–31, Midorigaoka, Ikeda, Osaka, 563-8577 Japan
Hiroyuki Kageyama
Affiliation:
Osaka National Research Institute, AIST, 1–8–31, Midorigaoka, Ikeda, Osaka, 563-8577 Japan
Kohei Kadono
Affiliation:
Osaka National Research Institute, AIST, 1–8–31, Midorigaoka, Ikeda, Osaka, 563-8577 Japan
Akiyoshi Chayahara
Affiliation:
Osaka National Research Institute, AIST, 1–8–31, Midorigaoka, Ikeda, Osaka, 563-8577 Japan
Nagao Kamijo
Affiliation:
Osaka National Research Institute, AIST, 1–8–31, Midorigaoka, Ikeda, Osaka, 563-8577 Japan
Masaki Makihara
Affiliation:
Osaka National Research Institute, AIST, 1–8–31, Midorigaoka, Ikeda, Osaka, 563-8577 Japan
Kanenaga Fujii
Affiliation:
Osaka National Research Institute, AIST, 1–8–31, Midorigaoka, Ikeda, Osaka, 563-8577 Japan
Junji Hayakawa
Affiliation:
Osaka National Research Institute, AIST, 1–8–31, Midorigaoka, Ikeda, Osaka, 563-8577 Japan
Mamoru Satou
Affiliation:
Osaka National Research Institute, AIST, 1–8–31, Midorigaoka, Ikeda, Osaka, 563-8577 Japan
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Abstract

Coordination state of gold atoms implanted in silica glass to an energy of 1.5 MeV and a dose of 1 × 1017 ions/cm2 has been studied by x-ray absorption fine structure spectroscopy. It was found that most of the gold atoms form gold clusters in which the nearest neighboring Au–Au interatomic distance is shorter by 0.05 °A than that in bulk gold. The contraction of Au–Au interatomic distance of gold clusters in silica glass is less than that reported in the previous studies on gold clusters within the other substrates. Gold atoms are coordinated by about four gold atoms in average. In addition, it was found that Au–O bonds are formed at the gold clusters/silica glass interface. It was deduced that the formation of Au–O bond at the gold clusters/silica glass interface depresses the contraction of Au–Au interatomic distance.

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Articles
Copyright
Copyright © Materials Research Society 1998

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