1. Sol–gel synthesis of Ge nanophases in silica
- Author
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Giorgio Spinolo, Roberto Lorenzi, Alessandro Lauria, Michele Catti, Alberto Paleari, Norberto Chiodini, D. Di Martino, Sergio Brovelli, Chiodini, N, Paleari, A, Catti, M, Brovelli, S, DI MARTINO, D, Lauria, A, Lorenzi, R, and Spinolo, G
- Subjects
chemical synthesi ,Materials science ,nanostructure ,Analytical chemistry ,Oxide ,Sintering ,chemistry.chemical_element ,Germanium ,General Chemistry ,Condensed Matter Physics ,law.invention ,chemistry.chemical_compound ,symbols.namesake ,inelastic light scattering ,Chemical engineering ,chemistry ,Transmission electron microscopy ,law ,scanning and transmission electron microscopy ,Materials Chemistry ,symbols ,Crystallization ,High-resolution transmission electron microscopy ,Raman spectroscopy ,Sol-gel - Abstract
Elemental Ge nanophases are obtained in silica starting from a sol-gel synthesis. The process comprises the preparation of silica xerogel doped by Ge(IV), substituting for Si(IV) in the oxide network, followed by reduction and phase separation during the sintering process by reaction with H-2 or CO. X-ray diffraction, Raman spectroscopy and high resolution transmission electron microscopy show that reactions with H-2 give rise in the porous silica network to nanometer-sized crystallization of elemental cubic germanium. (c) 2007 Elsevier Ltd. All rights reserved.
- Published
- 2007
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