Journal
CERAMICS INTERNATIONAL
Volume 39, Issue 7, Pages 8475-8480Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2013.01.112
Keywords
SnO2; Nanowires; Gas sensor; Hydrogen
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SnO2 nanowires were prepared on bare oxidized silicon, Au and SnO2-coated substrates by thermal evaporation of tin grains in argon atmosphere at 900 degrees C. X-ray diffraction (XRD) and field-emission scanning electron microscopy (FE-SEM) were used to characterize the SnO2 nanowires. FE-SEM images indicated that the size of SnO2 nanowires depend on the type of substrate. Gas sensor was fabricated by dispersing SnO2 nanowires on an interdigitated Pt-electrode. H-2 gas sensing properties of these sensors made of nanowires prepared on three different substrates were measured at various operating temperatures and concentrations respectively. SnO2 nanowires deposited on Au-coated substrates showed the highest sensitivity of 11.5 at 100 degrees C upon exposure to H-2 gas of 1000 ppm. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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