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Synthesis, Characterization and Water Vapor Sensitivities of Nanocrystalline SnO2 Thin Films

Published online by Cambridge University Press:  13 June 2012

M. Chacón ,
A. Watson ,
I. Abrego ,
E. Ching-Prado ,
J. Ardinsson  and
C. A. Samudio Perez
M. Chacón
Affiliation:
Natural Science Department, Faculty of Science and Technology Technological University of Panama, Panama
A. Watson
Affiliation:
Natural Science Department, Faculty of Science and Technology Technological University of Panama, Panama
I. Abrego
Affiliation:
Natural Science Department, Faculty of Science and Technology Technological University of Panama, Panama
E. Ching-Prado*
Affiliation:
Natural Science Department, Faculty of Science and Technology Technological University of Panama, Panama
J. Ardinsson
Affiliation:
Development Center of Nuclear Technology (CDTN), Federal University of Minas Gerais, Bello Horizonte, Brasil
C. A. Samudio Perez
Affiliation:
University of Passo Fundo, Porto Alegre, Brasil
*
*Corresponding author at: eleicer.ching@utp.ac.pa.
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Abstract

Thin films of SnO2 were prepared via wet chemical method and deposited by dip-coating on glass substrate. The annealing temperatures of the samples were 300, 400, 500 and 600o C, respectively. Water vapor sensor responses were measured and the experimental results are tested using the Freundlich model. The better water vapor sensitivities were obtained for annealing temperatures of 500 and 600oC, respectively. The samples were characterized morphological and structurally by SEM, XRD, Mössbauer spectroscopy and Raman spectroscopy. The fringes features in the ultraviolet-visible region indicate films thickness around 370 nm. The results are discussed in terms of the fine grain size of the samples.

Keywords

oxidesensorthin film
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1449: Symposium BB – Solution Synthesis of Inorganic Films and Nanostructured Materials , 2012 , mrss12-1449-bb06-18
Copyright
Copyright © Materials Research Society 2012

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