ZnO nanorods grown on ZnO sol–gel seed films: Characteristics and optical gas-sensing properties

ZnO sol–gel films, with and without embedded Pt nanoparticles, were used as seeding layers for the hydrothermal growth of ZnO nanorods. The morphology of the nanorods was controlled by adjusting the chemistry and processing, yielding samples with high transparencies and exposed surface areas. The pr...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2015-07, Vol.213, p.493-500
Main Authors: Cittadini, M., Sturaro, M., Guglielmi, M., Resmini, A., Tredici, I.G., Anselmi-Tamburini, U., Koshy, P., Sorrell, C.C., Martucci, A.
Format: Article
Language:English
Subjects:
Exposure
Nanoparticles
Nanorods
Optical gas sensors
Optical properties
Platinum
Pt nanoparticles
Sol gel process
Surface area
Zinc oxide
ZnO nanorods
ZnO sol–gel films
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Summary:ZnO sol–gel films, with and without embedded Pt nanoparticles, were used as seeding layers for the hydrothermal growth of ZnO nanorods. The morphology of the nanorods was controlled by adjusting the chemistry and processing, yielding samples with high transparencies and exposed surface areas. The prepared samples were assessed for performance as optical gas sensors in terms of absorbance variation and response time and these data were correlated with the structural properties. The nanorods grown on ZnO films containing Pt nanoparticles showed excellent H2-sensing properties owing to the high exposed surface areas of the ZnO nanorods and to the catalytic effect the underlying Pt nanoparticles.
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2015.03.002