Nb2O5 Schottky based ethanol vapour sensors : effect of metallic catalysts

Ab Kadir, Rosmalini, Abdul Rani, Rozina, Sabirin Zoolfakar, Ahmad, Ou, Jian Zhen, Bhaskaran, Madhu, Sriram, Sharath, Shafiei, Mahnaz, Wlodarski, Wojtek B., & Kalantar-zadeh, Kourosh (2014) Nb2O5 Schottky based ethanol vapour sensors : effect of metallic catalysts. Sensors and Actuators B : Chemical, 202, pp. 74-82.

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The aim of this paper is to compare the performances of the highly porous Nb2O5 Schottky based sensors formed using different catalytic metals for ethanol vapour sensing. The fabricated sensors consist of a fairly ordered nano-vein like porous Nb2O5 prepared via an elevated temperature anodization method. Subsequently, Pt, Pd and Au were sputtered as both Schottky contacts and catalysts for the comparative studies. These metals are chosen as they have large work functions in comparison to the electron affinity of the anodized Nb2O5. It is demonstrated that the device based on Pd/Nb2O5 Schottky contact has the highest sensitivity amongst the developed sensors. The sensing behaviors were studied in terms of the Schottky barrier height variations and properties of the metal catalysts.

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2 citations in Web of Science®

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ID Code: 71807
Item Type: Journal Article
Refereed: Yes
Additional URLs:
Keywords: Niobium oxide, , anodization, , ethanol vapour, , gas sensor, , catalytic effect
DOI: 10.1016/j.snb.2014.04.083
ISSN: 0925-4005
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)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 19 May 2014 23:18
Last Modified: 19 Dec 2014 07:22

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