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Journal of Sol-Gel Science and Technology
Published in: Journal of Sol-Gel Science and Technology 2/2008

01-02-2008 | Original Paper

On the nature of the processes occurring in silver doped SiO2 films under heat treatment

Authors: Gvidona P. Shevchenko, Svyatlana V. Vashchanka, Yulia V. Bokshits, Sergey K. Rakhmanov

Published in: Journal of Sol-Gel Science and Technology | Issue 2/2008

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Abstract

The processes taking place on air-heating of SiO2−Ag+ films and xerogels produced from the SiO2 sols of different pH (3.7 or 9.5) were investigated. Silver nanoparticles 10–40 nm in size tolerant to oxidation at temperatures above 600 °C were found to be formed in the systems whatever the pH value of the starting sol. SiO2 crystallization giving the cristobalite phase in the temperature range from 500 to 800 °C was shown to proceed only in the films produced from the acidic sol, while in those formed from the alkali one SiO2 remained amorphous. A mechanism by which the formation of Ag nanoparticles and the cristobalite phase occurs in the films at the oxidative conditions is suggested.
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Metadata
Title
On the nature of the processes occurring in silver doped SiO2 films under heat treatment
Authors
Gvidona P. Shevchenko
Svyatlana V. Vashchanka
Yulia V. Bokshits
Sergey K. Rakhmanov
Publication date
01-02-2008
Publisher
Springer US
Published in
Journal of Sol-Gel Science and Technology / Issue 2/2008
Print ISSN: 0928-0707
Electronic ISSN: 1573-4846
DOI
https://doi.org/10.1007/s10971-007-1654-3

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