Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/26507
Title: Improved H2-sensing performance of nanocluster-based highly porous tungsten oxide films operating at moderate temperature
Authors: Zhao, M
Ong, CW 
Keywords: H2 sensor
WO3 nanoclusters
High porosity
Fast response
High cyclic stability
Issue Date: 2012
Publisher: Elsevier
Source: Sensors and actuators. B, Chemical, 2012, v. 174, p. 65-73 How to cite?
Journal: Sensors and actuators. B, Chemical 
Abstract: Many nano-metal oxides are claimed to be responsive to H2 at room-temperature, but their response rates may be too low for the signal to reach equilibrium quickly. We investigated the H2-induced resistive response of palladium-coated supersonic cluster beam deposited tungsten oxide (Pd/SCBD WO3) films at temperatures Tsen between 20 and 140 °C. They are constructed of genuine nano WO3 clusters (3–5 nm) loosely packed together, and have a high porosity. Slight increase of Tsen from room-temperature greatly speeds up the response rate and gives a strong apparent sensor response. Other advantages include excellent cyclic stability and selectivity against vapors of various organic compounds; negligible influence from moisture and mild ambient pressure dependence.
URI: http://hdl.handle.net/10397/26507
ISSN: 0925-4005
EISSN: 1873-3077
DOI: 10.1016/j.snb.2012.08.018
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