The processes going on in silver-doped GeO2 films during air-heating were investigated by XPS, TEM, IR and UV-visible spectroscopy methods. Silver was shown to interact with the GeO2 matrix at 500-600degreesC to give silver germanate which was decomposed on further heating to form GeO2 and silver nanoparticles, 10-35nm in size. absorbing in the plasmon resonance region (lambda(max) = 415nm). The silver nanoparticles are located deep in the films and encapsulated by oxide particles. (C) 2004 Elsevier B.V. All rights reserved.
机构:
Univ Utah, Nanostruct Mat Res Lab, Dept Mat Sci & Engn, Salt Lake City, UT 84112 USAUniv Utah, Nanostruct Mat Res Lab, Dept Mat Sci & Engn, Salt Lake City, UT 84112 USA
Sygnatowicz, Michael
Keyshar, Kunttal
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Univ Utah, Nanostruct Mat Res Lab, Dept Mat Sci & Engn, Salt Lake City, UT 84112 USAUniv Utah, Nanostruct Mat Res Lab, Dept Mat Sci & Engn, Salt Lake City, UT 84112 USA
Keyshar, Kunttal
Tiwari, Ashutosh
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Univ Utah, Nanostruct Mat Res Lab, Dept Mat Sci & Engn, Salt Lake City, UT 84112 USAUniv Utah, Nanostruct Mat Res Lab, Dept Mat Sci & Engn, Salt Lake City, UT 84112 USA