Hydrogen gas sensors based on thermally evaporated nanostructured MoO3 Schottky diode : a comparative study

Shafiei, M., Yu, J., Motta, N., Wu, Q., Hu, Z., Qian, L., Kalantar-zadeh, K., & Wlodarski, W. (2011) Hydrogen gas sensors based on thermally evaporated nanostructured MoO3 Schottky diode : a comparative study. In Lewis, Elfred (Ed.) Proceedings of the IEEE SENSORS 2011 Conference, IEEE, University of Limerick, Limerick, Ireland, pp. 8-11.

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Abstract

In this paper, a comparative study of Pt/nanostructured MoO3/SiC Schottky diode based hydrogen gas sensors is presented. MoO3 nanostructured films with three different morphologies (nanoplatelets, nanoplateletsnanowires and nano-flowers) were deposited on SiC by thermal evaporation. We compare the current-voltage characteristics and the dynamic response of these sensors as they are exposed to hydrogen gas at temperatures up to 250°C. Results indicate that the sensor based on MoO3 nanoflowers exhibited the highest sensitivity (in terms of a 5.79V voltage shift) towards 1% hydrogen; while the sensor based on MoO3 nanoplatelets showed the quickest response (t90%- 40s).

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ID Code: 59558
Item Type: Conference Paper
Refereed: Yes
Additional URLs:
DOI: 10.1109/ICSENS.2011.6126970
ISBN: 9781424492886
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > ANALYTICAL CHEMISTRY (030100) > Sensor Technology (Chemical aspects) (030107)
Australian and New Zealand Standard Research Classification > TECHNOLOGY (100000) > NANOTECHNOLOGY (100700) > Nanomaterials (100708)
Australian and New Zealand Standard Research Classification > TECHNOLOGY (100000) > NANOTECHNOLOGY (100700) > Nanoscale Characterisation (100712)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2011 Institute of Electrical and
Electronics Engineers, Inc.
Copyright Statement: Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new
collective works for resale or redistribution to servers or lists, or to use any copyrighted component of this work in other works must be obtained from the IEEE.
Deposited On: 02 May 2013 01:06
Last Modified: 02 May 2013 01:08

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