Hydrogen sensing properties of Pt/Lanthanum oxide- molybdenum oxide nanoplatelet/SiC based Schottky diode

Shafiei, M., Yu, J., Chen, G., Lai, P., Motta, N., & Kalantar-zadeh, K. (2012) Hydrogen sensing properties of Pt/Lanthanum oxide- molybdenum oxide nanoplatelet/SiC based Schottky diode. In Proceedings of the 14th International Meeting on Chemical Sensors - IMCS 2012, Nürnberg/Nuremberg, Germany, pp. 802-805.

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Abstract

An investigation of the electrical and hydrogen sensing properties of a novel Schottky diode based on a nanostructured lanthanum oxide-molybdenum oxide compound is presented herein. Molybdenum oxide (MoO3) nanoplatelets were grown on SiC substrates via thermal evaporation which was then subsequently coated with lanthanum oxide (La2O3) by RF sputtering. The current-voltage characteristics and hydrogen sensing performance (change in barrier height and sensitivity as well as the dynamic response) were examined from 25 to 300°C. At 180°C, a voltage shift of 2.23V was measured from the sensor while exposed to 1% hydrogen gas under a 100 μA constant reverse bias current. The results indicate that the presence of a La2O3 thin layer substantially improves the hydrogen sensitivity of the MoO3 nanoplatelets.

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ID Code: 59552
Item Type: Conference Paper
Refereed: Yes
Additional Information: All accepted participants are invited to submit a paper for potential publication in a special issue of the journal Sensors and Actuators B: Chemical, devoted to the IMCS 2012 Conference. Please note that all manuscripts will be subject to the usual selection process including the peer review procedure. The acceptance for presentation at the conference will not be a guarantee that the paper will also be included in the special issue.
Keywords: gas sensor, hydrogen, Schottky diode, nanostructures, lanthanum oxide-molybdenum oxide compound
ISBN: 9783981348422
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 2012 please consult the authors
Deposited On: 02 May 2013 00:55
Last Modified: 06 May 2013 16:56

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