Nanostructured hexagonal tungsten oxides for ammonia sensing

Lisheng Wang; Judit Pfeifer; Csaba Balázsi; Imre Miklós Szilágyi; P. I. Gouma

doi:10.1117/12.736679

11 October 2007 Nanostructured hexagonal tungsten oxides for ammonia sensing

Lisheng Wang, Judit Pfeifer, Csaba Balázsi, Imre Miklós Szilágyi, P. I. Gouma

Proceedings Volume 6769, Nanosensing: Materials, Devices, and Systems III; 67690E (2007) https://doi.org/10.1117/12.736679
Event: Optics East, 2007, Boston, MA, United States

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.

Citation Download Citation

Lisheng Wang, Judit Pfeifer, Csaba Balázsi, Imre Miklós Szilágyi, and P. I. Gouma "Nanostructured hexagonal tungsten oxides for ammonia sensing", Proc. SPIE 6769, Nanosensing: Materials, Devices, and Systems III, 67690E (11 October 2007); https://doi.org/10.1117/12.736679

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