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Nanostructured TiO2 and W:TiO2Thin Films by a Novel Sol-Gel Processing for Alcohol Sensing Devices

Published online by Cambridge University Press:  17 March 2011

Carlotta Garzella ,
Elisabetta Comini ,
Elza Bontempi ,
Laura E. Depero ,
Cesare Frigeri  and
Giorgio Sberveglieri
Carlotta Garzella
Affiliation:
INFM and Department of Chemistry and Physics for Engineering and Materials, Brescia University, via Valotti 9, 25133 Brescia, Italy
Elisabetta Comini
Affiliation:
INFM and Department of Chemistry and Physics for Engineering and Materials, Brescia University, via Valotti 9, 25133 Brescia, Italy
Elza Bontempi
Affiliation:
INFM and Structural Chemistry Laboratory, Department of Mechanical Engineering, Brescia University, via Branze 38, Brescia, Italy
Laura E. Depero
Affiliation:
INFM and Structural Chemistry Laboratory, Department of Mechanical Engineering, Brescia University, via Branze 38, Brescia, Italy
Cesare Frigeri
Affiliation:
CNR-MASPEC Institut, Parco Area della Scienze, Parma, Italy
Giorgio Sberveglieri
Affiliation:
INFM and Department of Chemistry and Physics for Engineering and Materials, Brescia University, via Valotti 9, 25133 Brescia, Italy
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Abstract

TiO2and W:TiO2 thin films have been prepared by a chemically modified sol-gel technique, that implies hydrolysis and condensation of tetraethylortotitanate in the presence of a polymer dissolved in ethanol. Oxide-polymer films were deposited by dip-coating. Annealing at 500°C results in nanosized structurally stable oxides films. For doping tungsten(V)ethoxide was used in concentration that led to a final W/Ti atomic ratio of 1/33, 5/33, 10/33. The morphological and structural characteristics of thin films were studied through microraman, GIXRD, SEM and TEM. A microstructural comparison between pure and doped TiO2 layers is reported. Ethanol and methanol sensing properties are tested.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 638: Symposium F – Microcrystaline & Nanocrystalline Semiconductors-2000 , 2000 , F5.39.1
Copyright
Copyright © Materials Research Society 2001

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