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Cu microcrystals in sol-gel derived glasses

Published online by Cambridge University Press:  03 March 2011

Masayuki Nogami ,
Yoshihiro Abe  and
Arao Nakamura
Masayuki Nogami
Affiliation:
Nagoya Institute of Technology, Showa Nagoya, 466 Japan
Yoshihiro Abe
Affiliation:
Nagoya Institute of Technology, Showa Nagoya, 466 Japan
Arao Nakamura
Affiliation:
Nagoya University, Chikusa Nagoya, 464 Japan
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Abstract

Cu2+-containing SiO2 and Al2O5 · 9SiO2 glasses were prepared by the sol-gel method and heated under reducing conditions to precipitate small-sized Cu and Cu2O erystals. Cu2+ ions incorporated in SiO2 glass were reduced by heating in N2 to precipitate Cu2O and in H2 to precipitate Cu microcrystals with diameters of about 5 to 15 nm. Microcrystalline Cu-precipitated glass showed an optical absorption band at 560 nm and its third-order nonlinear susceptibility was 1.25 × 10−10 esu, which originated from the enhancement by the surface plasmon resonance of Cu particles. In contrast, Cu2+ ions incorporated in Al2O3 · 9SiO2 glass remained unchanged after heating in the reducing gas atmospheres.

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Articles
Information
Journal of Materials Research , Volume 10 , Issue 10 , October 1995 , pp. 2648 - 2652
Copyright
Copyright © Materials Research Society 1995

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References

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