Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 42, Issue 2, Pages 1344-1352Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2016.09.187
Keywords
Gas sensor; Tungsten oxide; Hydrogen sensing; Nanorods; Nanofabrication; Electron beam lithography
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Funding
- Czech Ministry of Education [LD13054]
- Charles University in Prague, project GA UK [236214]
- European Regional Development Fund under Project NTIS - New Technologies for Information Society, European Centre of Excellence [CZ.1.05/1.1.00/02.0090]
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Electron beam lithography was used to fabricate platinum At-contacts over tungsten oxide nanorods formed on a mica substrate. This made possible the measurement of sensorial response of these self-assembled tungsten oxide nanorods to hydrogen gas for the first time. The nanorods were prepared by thermal evaporation from an oxide source. Consequently, two types of conductometric sensors were assembled: a) percolating network of nanorods and b) set of individually contacted WO3 nanorods. The preparation procedures are described in detail and the comparison of response of both types of assemblies is given. The first sensorial measurements revealed a good response of the b) type of sensor and the minimum repeatedly detected concentration of H-2 was 50 ppm. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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