A study on the microstructure and gas sensing properties of ITO nanocrystals
authors Neri, G; Bonavita, A; Micali, G; Rizzo, G; Pinna, N; Niederberger, M; Ba, J
nationality International
journal THIN SOLID FILMS
author keywords ITO; indium tin oxide; sol-gel routes; gas sensing
keywords METAL-OXIDE NANOPARTICLES; TRANSPARENT CONDUCTING OXIDES; NONAQUEOUS SYNTHESIS; THIN-FILMS; SENSORS; ROUTES
abstract The effect of different SnO2 loading (0-25 wt.%) on the microstructural, electrical and gas sensing properties of ITO (indium tin oxide) nanocrystals synthesized by a non-aqueous sol-gel technique was evaluated. TEM, HRTEM and XRD characterization has shown that all samples have a uniform grain morphology and narrow particle size distribution, while a remarkable size reduction was observed with the increase of tin loading in the mixed oxide formulation. Redox properties of the samples were also characterized by H-2-TPR. The gas sensing properties of ITO films towards CO (100-1000 ppm) and ethanol (50-400 ppm) have been investigated. On the basis of the characterization data, explanations of the observed sensing behaviour of ITO films are given. (c) 2007 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE SA
issn 0040-6090
year published 2007
volume 515
issue 24
beginning page 8637
ending page 8640
digital object identifier (doi) 10.1016/j.tsf.2007.03.166
web of science category Materials Science, Multidisciplinary; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter
subject category Materials Science; Physics
unique article identifier WOS:000250497000044
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journal impact factor 1.939
5 year journal impact factor 1.796
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