A hydrogen/methane sensor based on niobium tungsten oxide nanorods synthesised by hydrothermal method

Yu, J, Wen, H, Shafiei, M, Field, M, Liu, Z, Wlodarski, W, Motta, N, Li, Y, Kalantar Zadeh, K and Lai, P 2013, 'A hydrogen/methane sensor based on niobium tungsten oxide nanorods synthesised by hydrothermal method', Sensors and Actuators B: Chemical: International Journal Devoted to Research and Development of Physical and Chemical Transducers, vol. 184, pp. 118-129.


Document type: Journal Article
Collection: Journal Articles

Title A hydrogen/methane sensor based on niobium tungsten oxide nanorods synthesised by hydrothermal method
Author(s) Yu, J
Wen, H
Shafiei, M
Field, M
Liu, Z
Wlodarski, W
Motta, N
Li, Y
Kalantar Zadeh, K
Lai, P
Year 2013
Journal name Sensors and Actuators B: Chemical: International Journal Devoted to Research and Development of Physical and Chemical Transducers
Volume number 184
Start page 118
End page 129
Total pages 12
Publisher Elsevier S.A.
Abstract An investigation on hydrogen and methane sensing performance of hydrothermally formed niobium tungsten oxide nanorods employed in a Schottky diode structure is presented herein. By implementing tungsten into the surface of the niobium lattice, we create Nb5+ and W5+ oxide states and an abundant number of surface traps, which can collect and hold the adsorbate charge to reinforce a greater bending of the energy bands at the metal/oxide interface. We show experimentally, that extremely large voltage shifts can be achieved by these nanorods under exposure to gas at both room and high temperatures and attribute this to the strong accumulation of the dipolar charges at the interface via the surface traps. Thus, our results demonstrate that niobium tungsten oxide nanorods can be implemented for gas sensing applications, showing ultra-high sensitivities.
Subject Functional Materials
Electrical and Electronic Engineering not elsewhere classified
Keyword(s) Hydrogen
Methane
Nanorods
Niobium oxide
Sensor
Tungsten oxide
DOI - identifier 10.1016/j.snb.2013.03.135
Copyright notice © 2013 Elsevier B.V. All rights reserved.
ISSN 0925-4005
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Citation counts: TR Web of Science Citation Count  Cited 21 times in Thomson Reuters Web of Science Article | Citations
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