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Vol. 149, No. 2, February 2013, pp. 43-48




Molybdenum Doped SnO2 Thin Films as a Methanol Vapor Sensor

1 Patil Shriram B. 2 More Mahendra A. and 3 Patil Arun V.

1Department of Physics, S. S. V. P. S. L. K. Dr. P. R. Ghogrey Science College, Deopur, Dhule, 424002, India

2 Center for Advanced Studies in Materials Science and Solid State Physics, Department of Physics, University of Pune, Pune 411007, India

3 Department of Electronics Science, L. V. H. College, Panchavati, Nashik-3, Maharashtra, India

E-mail: sbpatil25@yahoo.com, mam@physics.unipune.ernet.in, aruptl@gmail.com


Received: 23 September 2013   /Accepted: 14 February 2013   /Published: 28 February 2013

Digital Sensors and Sensor Sysstems


Abstract: The molybdenum doped SnO2 thin films were synthesized by conventional spray pyrolysis route and has been investigated for the methanol vapor sensing. The structural and elemental composition analysis of thin films was carried out by X- ray diffraction and Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray spectroscopy (EDAX).The XRD spectrum revealed that the thin films have the polycrystalline nature with a mixed phase comprising of SnO2 and MoO3. The scanning Electron Microscopy (SEM) clears that the surface morphology observed to be granular, uniformly covering the entire surface area of the thin film. The methanol vapor sensing studies were performed in dry air at the different temperatures. The influence of the concentration of Molybdenum and operating temperature on the sensor performance has been investigated.


Keywords: Gas sensor, Spray pyrolysis, Methanol, Tin oxide, Molybdenum trioxide


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