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Vol. 140, No. 5, May 2012, pp. 124-132

 

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Spray Pyrolysed Nanostructured ZnO Thin Film Sensors for Ethanol Gas

 

a Ramesh BARI, a Sharad PATIL, b Anil BARI, c Ganesh PATIL, d Jalindar AMBAKER

a Nanomaterials Research Laboratory, Department of Physics, G. D. M. Arts,

K. R. N. Commerce and M.D. Science College, Jamner 424 206, India

b Department of Physics, Arts, Commerce and Science College, Bodwad 425 310, India

c Materials Research Laboratory, Arts, Commerce and Science College, Nandgaon 423 106

d Centre for Material for Electronic Technology (C-MET), Pune 411 008, India

Tel.: +919423914198

E-mail: rameshbari24@yahoo.com

 

 

Received: 1 March 2012   /Accepted: 23 May 2012   /Published: 31May 2012

 

Digital Sensors and Sensor Sysstems

 

Abstract: Nanostructured ZnO thin films were deposited onto glass substrates at 250 oC by air assited spray pyrolysis (SP) technique. The films were characterized using X-ray diffraction (XRD), Field emission scanning electron microscopy (FE-SEM). Thermoelectric power measurement were conducting using TEP setup, Electrical conductivity and gas sensing performance were conducted using static gas sensing system. These films were tested in various gases at different operating temperature. The films showed maximum response to ethanol gas. The ethanol sensing properties of the films were investigated with different thickness of film. It was found that the different thickness of film significantly affects the response of the nanostructured ZnO thin film to the ethanol. The maximum response was found for the thickness of film 362 nm. The speed of response is quick (3s) and recovery is fast (7s). The results were discussed and interpreted.

 

Keywords: Nanostructured ZnO, Spray pyrolysis, Thin films, Film thickness, Ethanol sensor

 

 

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