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Vol. 137, Issue 2, February 2012, pp. 47-58

 

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Properties and Gas Sensing Mechanism Study of CTO Thin Films as Ethanol Sensor

 

1 Ganesh E. Patil, 1 D. D. Kajale, 2 V. B. Gaikwad, 3 N. K. Pawar, 1,* G. H. Jain

1 Materials Research Lab., Arts, Commerce and Science College, Nandgaon 423 106 India

 2 Materials Research Lab., K.T.H.M. College, Nashik 422 005 India

3 Dept. of Physics, K.A.A.N.M. Sonanwane Arts, Commerce & Science College, Satana 423301 India

* Tel.: +91 9423474476

E-mail: gotanjain@rediffmail.com (G. H. Jain)

 

 

Received: 8 November 2011   /Accepted: 14 February 2012   /Published: 28 February 2012

Digital Sensors and Sensor Sysstems

 

Abstract: Cr doped tin oxide (CTO) thin films were prepared by spray pyrolysis technique (SPT). The hollow microspheres with a high Cr incorporation (10 at. %) was found to posses excellent sensitivity, selectivity and rapid response to the presence of ethanol vapors at low temperature. X-ray diffraction, UV, scanning electron microscopy and energy dispersive X-ray analysis were carried out to investigate the gas sensing mechanism. The optical study showed that the films have a band gap of 3.54 eV.

 

Keywords: Cr doped tin oxide, Thin films, Spray pyrolysis, Sensing mechanism

 

 

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