Srivastava, Vibha and Jain, Kiran (2008) Highly sensitive NH3 sensor using Pt catalyzed silica coating over WO3 thick films. Sensors and Actuators B: Chemical, 133. pp. 46-52. ISSN 0925-4005

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Ammonia gas sensing properties of a single layerWO3 thick film and a double layer sensor structure having a supported catalyst on it have been investigated. The single layer sensor exhibited low response to NH3. An enhancement in gas response was achieved by dopingWO3 with Pt, Pd or Au. Ammonia sensing properties of the WO3 thick film was improved markedly by overcoating a platinum catalyzed silica-niobia layer onto the WO3 film surface. Such a double layer structure not only increased the gas response, but decreased the response time also.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s Elsevier B.V.
Uncontrolled Keywords: Ammonia sensor; WO3; Thick film sensor; Metal oxide sensor
Subjects: Applied Physics/Condensed Matter
Depositing User: Ms Neetu Chandra
Date Deposited: 10 Mar 2015 06:37
Last Modified: 10 Mar 2015 06:37

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