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.
Chiodini, N., Paleari, A., Catti, M., Brovelli, S., DI MARTINO, D., Lauria, A., et al. (2007). Sol-gel synthesis of Ge nanophases in silica. SOLID STATE COMMUNICATIONS, 144(10-11), 429-432 [10.1016/j.ssc.2007.09.021].
Sol-gel synthesis of Ge nanophases in silica
CHIODINI, NORBERTO;PALEARI, ALBERTO MARIA FELICE;CATTI, MICHELE;BROVELLI, SERGIO;DI MARTINO, DANIELA;LAURIA, ALESSANDRO;LORENZI, ROBERTO;SPINOLO, GIORGIO MARIO
2007
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.
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