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Proceedings Paper

Nanostructured hexagonal tungsten oxides for ammonia sensing
Author(s): Lisheng Wang; Judit Pfeifer; Csaba Balázsi; Imre Miklós Szilágyi; P. I. Gouma
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Paper Abstract

Among the family of wide band-gap semiconducting metal oxides, tungsten trioxide is the most promising oxide for gas sensing. A metastable open-structured hexagonal phase of WO3 was successfully synthesized using acid precipitation method. The oxide was characterized using SEM, TEM and XRD. The sensing property to reducing ammonia gas was measured. The sensitivity is much higher than that of monoclinic tungsten oxides. The oxide polymorph exhibits a p-n type transition when the temperature goes from 100 °C to 300 °C.

Paper Details

Date Published: 11 October 2007
PDF: 8 pages
Proc. SPIE 6769, Nanosensing: Materials, Devices, and Systems III, 67690E (11 October 2007); doi: 10.1117/12.736679
Show Author Affiliations
Lisheng Wang, Stony Brook Univ. (United States)
Judit Pfeifer, Research Institute for Technical Physics and Materials Science (Hungary)
Csaba Balázsi, Research Institute for Technical Physics and Materials Science (Hungary)
Imre Miklós Szilágyi, Budapest Univ. of Technology and Economics (Hungary)
P. I. Gouma, Stony Brook Univ. (United States)

Published in SPIE Proceedings Vol. 6769:
Nanosensing: Materials, Devices, and Systems III
M. Saif Islam; Achyut K. Dutta, Editor(s)

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