Zargar, R. A. and Arora, M. and Chackrabarti, S. and Ahmad, S. and Kumar, J. and Hafiz, A. K. (2016) Alcohol vapor sensing by cadmium-doped zinc oxide thick films based chemical sensor. Modern Physics Letters B, 30 (12). 1650244-1-1650244-11. ISSN 0217-9849

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Abstract

Cadmium-doped zinc oxide nanoparticles were derived by simple chemical co-precipitation route using zinc acetate dihydrate and cadmium acetate dihydrate as precursor materials. The thick films were casted from chemical co-precipitation route prepared nanoparticles by economic facile screen printing method. The structural, morphological, optical and electrical properties of the film were characterized relevant to alcohol vapor sensing application by powder XRD, SEM, UV-VIS and DC conductivity techniques. The response and sensitivity of alcohol (ethanol) vapor sensor are obtained from the recovery curves at optimum working temperature range from 20 degrees C to 50 degrees C. The result shows that maximum sensitivity of the sensor is observed at 25 degrees C operating temperature. On varying alcohol vapor concentration, minor variation in resistance has been observed. The sensing mechanism of sensor has been described in terms of physical adsorption and chemical absorption of alcohol vapors on cadmium-doped zinc oxide film surface and inside film lattice network through weak hydrogen bonding, respectively.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/S World Scientific Publishing.
Uncontrolled Keywords:	Doped zinc oxide; alcohol; sensor; thick films.
Subjects:	Applied Physics/Condensed Matter Physics > Mathematical Physics
Divisions:	UNSPECIFIED
Depositing User:	Dr. Rajpal Walke
Date Deposited:	02 Jun 2017 08:02
Last Modified:	02 Jun 2017 08:02
URI:	http://npl.csircentral.net/id/eprint/2140

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