A hydrogen gas sensor based on Pt/nanostructured WO3/SiC Schottky diode

Shafiei, Mahnaz, Sadek, Abu Z, Yu, Jerry, Latham, Kay, Breedon, Michael, McCulloch, Dougal, Kalantar-zadeh, Kourosh, & Wlodarski, Wojtek (2011) A hydrogen gas sensor based on Pt/nanostructured WO3/SiC Schottky diode. Sensor Letters, 9(1), pp. 11-15.

[img] Accepted Version (PDF 688kB)
Administrators only | Request a copy from author

View at publisher

Abstract

Pt/nanostructured WO3/SiC Schottky diodes were fabricated and applied for hydrogen gas sensing applications. The nanostructured WO3 films were synthesized from tungsten coated SiC substrates via an acid-etching method using a 1.5 M HNO3 solution for 1 hr, 2 hrs and 3 hrs duration. Scanning electron microscopy of the developed films revealed platelet crystals with thicknesses in the order of 20-60 nm and lengths between 100-700 nm. X-ray diffraction analysis revealed that the rate of oxidation of tungsten increases as the duration of acid-etching increases. The devices were tested towards hydrogen gas balanced in air at different temperatures from 25°C to 200°C. At 200°C, voltage shifts of 0.45 V, 0.93 V and 2.37 V were recorded for devices acid-etched for 1 hr, 2 hrs and 3 hrs duration, respectively upon exposure to 1% hydrogen, under a constant forward bias current of 500 µA.

Impact and interest:

7 citations in Scopus
Search Google Scholar™
6 citations in Web of Science®

Citation counts are sourced monthly from Scopus and Web of Science® citation databases.

These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.

Citations counts from the Google Scholar™ indexing service can be viewed at the linked Google Scholar™ search.

ID Code: 46226
Item Type: Journal Article
Refereed: Yes
Keywords: Nanostructured WO3, Gas Sensors, Schottky Diode, Hydrogen, Acid-etching
DOI: 10.1166/sl.2011.1409
ISSN: 1546-198X
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Copyright Owner: Copyright 2011 Please consult the authors.
Deposited On: 29 Sep 2011 01:21
Last Modified: 09 Nov 2016 23:58

Export: EndNote | Dublin Core | BibTeX

Repository Staff Only: item control page