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Details of Grant 

EPSRC Reference: GR/M35390/01
Title: ENHANCED OXIDE SENSORS BASED ON DOPED TIN AND ANTIMONY OXIDES
Principal Investigator: Haycock, Professor PW
Other Investigators:
Molloy, Professor KC
Researcher Co-Investigators:
Project Partners:
Pre Nexus Migration SAFC Hitech
Department: Sch of Chemistry & Physics
Organisation: Keele University
Scheme: Standard Research (Pre-FEC)
Starts: 22 March 1999 Ends: 21 October 2002 Value (£): 94,346
EPSRC Research Topic Classifications:
Materials Processing
EPSRC Industrial Sector Classifications:
No relevance to Underpinning Sectors Electronics
Related Grants:
Panel History:  
Summary on Grant Application Form
Semiconducting metal oxides form the basis of many gas sensing devices and are the fastest growing sector of the market. Sn02 is the main oxide used, but problems exist with selectivity, sensitivity, consistency of performance and interference from atmospheric moisture. Thin-film technology, which can generate homogeneous films of controlled thickness and impurity levels along with tailored amounts of dopant metals to enhance selectivity, can overcome many of these issues. We propose to investigate the processing of thin-film Sn02-based sensors by MOCVD deposition of Sn02 doped with Cd, Pt, Cu and Bi for devices targetted at gases important in the mining and off-shore industries (CH4, CO, H2S, NOx). We will also explore analogous yet novel Sb205-based systems which are possible moisture-insensitive alternatives to Sn02 devices, thus developing the manufacture of sensing devices in an incremental way.The key to the project is the manufacturing process (CVD) which in turn depends on the choice of volatile precursors used for both the base oxide and dopants. The project is thus interdisciplinary, and brings together synthetic chemistry (Bath), CVD technology (Keele, Epichem), and manufacturers of both speciality chemicals for CVD (Epichem) and sensors (Trolex). In situ field trials with RJB Mining have been arranged.
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Further Information:  
Organisation Website: http://www.keele.ac.uk