Hydrothermally formed functional niobium oxide doped tungsten nanorods

Yu, Jerry, Yuan, Liu, Wen, Hao, Shafiei, Mahnaz, Field, Matthew, Jia, Liang, Yang, Jin, Liu, Zhi Fu, Wlodarski, Wojtek, Motta, Nunzio, Li, Yong Xiang, Zhang, Gengmin, Kalantar-zadeh, Kourosh, & Lai, Peter To (2013) Hydrothermally formed functional niobium oxide doped tungsten nanorods. Nanotechnology, 24(49), p. 495501.

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Abstract

Nanorod forms of metal oxides is recognised as one of the most remarkable morphologies. Their structure and functionality have driven important advancements in a vast range of electronic devices and applications. In this work, we postulate a novel concept to explain how numerous localised surface states can be engineered into the bandgap of niobium oxide nanorods using tungsten. We discuss their contributions as local state surface charges for the modulation of a Schottky barrier height, relative dielectric constant and their respective conduction mechanisms. Their effect on the hydrogen gas molecule interactions mechanisms are also examined herein. We synthesised niobium tungsten oxide (Nb17W2O25) nanorods via a hydrothermal growth method and evaluated the Schottky barrier height, ideality factor, dielectric constant and trap energy level from the measured I-V vs temperature characteristics in the presence of air and hydrogen to show the validity of our postulations.

Impact and interest:

4 citations in Scopus
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3 citations in Web of Science®

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ID Code: 63441
Item Type: Journal Article
Refereed: Yes
Additional URLs:
Keywords: Niobium oxide, tungsten oxide, nanorods, hydrothermal, hydrogen, localised states, thermionic emission, Poole-frenkel
DOI: 10.1088/0957-4484/24/49/495501
ISSN: 0957-4484
Subjects: Australian and New Zealand Standard Research Classification > TECHNOLOGY (100000) > NANOTECHNOLOGY (100700)
Australian and New Zealand Standard Research Classification > TECHNOLOGY (100000) > NANOTECHNOLOGY (100700) > Nanoelectronics (100705)
Australian and New Zealand Standard Research Classification > TECHNOLOGY (100000) > NANOTECHNOLOGY (100700) > Nanomaterials (100708)
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: 17 Oct 2013 22:37
Last Modified: 24 Jan 2014 00:49

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