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Gasochromic performance of WO3 nanorod thin films for low concentration H2 sensing


Yaacob, Mohd. Hanif and Ou, Jian Zhen and Oh, C. and Kang, J. and Sberveglieri, Giorgio and Wlodarski, Wojtek (2011) Gasochromic performance of WO3 nanorod thin films for low concentration H2 sensing. Procedia Engineering, 25. pp. 1065-1068. ISSN 1877-7058


Absorbance response of tungsten trioxide (WO3) nanorod thin films coated with palladium (Pd) towards hydrogen (H2) was investigated. WO3 nanorods were deposited onto quartz substrates via pulsed laser deposition (PLD) technique. Highly homogeneous arrays of nanorods in the sizes of 30 - 80 nm were observed. Subsequently, 25 Å Pd was deposited onto films via dc sputtering. The Pd/WO3 nanorod thin films exhibited excellent gasochromic response when measured in the visible-NIR range (400 – 1000 nm). As low as 0.06% H2 concentration was clearly sensed. A significant reversible absorbance change and fast recovery (<2 min) were observed when the films were exposed to H2 with different concentrations.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
DOI Number: https://doi.org/10.1016/j.proeng.2011.12.262
Publisher: Elsevier
Keywords: Hydrogen; Pd; WO3 Nanorod; Optical sensor; Absorbance; Pulsed laser deposition
Depositing User: Nabilah Mustapa
Date Deposited: 04 Aug 2016 08:47
Last Modified: 04 Aug 2016 08:47
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.proeng.2011.12.262
URI: http://psasir.upm.edu.my/id/eprint/48092
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