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ISSN: 2157-7439

Journal of Nanomedicine & Nanotechnology
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Research Article

Synthesis and Characterization of Nanocrystalline Zinc Oxide Thin Films for Ethanol Vapor Sensor

Bhasha S1*, Malik P1, Santosh S2 and Purnima J1

1Department of Chemistry, Netaji Subhas Institue of Technology, Dwarka, New Delhi, India

2CSIR-National Physical Laboratories, New Delhi, India

*Corresponding Author:
Bhasha S
Department of Chemistry
Netaji Subhas Institue of Technology
Dwarka, Sec-3, New Delhi, India
Tel: 011 2509 9050
E-mail: [email protected]

Received Date: June 01, 2015 Accepted Date: June 12, 2015 Published Date: June 22, 2015

Citation: Bhasha S, Malik P, Santosh S, Purnima J (2015) Synthesis and Characterization of Nanocrystalline Zinc Oxide Thin Films for Ethanol Vapor Sensor. J Nanomed Nanotechnol 6:306. doi:10.4172/2157-7439.1000306

Copyright: © 2015 Bhasha S, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

ZnO nanoparticles as gas sensors have a property of changing the electrical conductivity of the sensing element on exposure to gas atmospheres. The number, density and size distribution of particles plays a key role in gas sensing applications. The gas sensing mechanism mainly depends upon the morphology, ion occupancy and the operating temperature, which helps in adsorbing the OH- groups on the surface of oxide materials. The ethanol vapor sensing measurements have been carried out on the ZnO pellet with silver pasted electrodes on both the ends. The change in electrical resistance was used as the measure of ethanol vapor response at different temperatures in the range of 25°C to 45°C at an interval of 5°C under an ethanol concentration of 25.02, 50.05, 75.08, 100.11 and 150.17 ppm. These results showed that the indium zinc oxide film based ethanol sensor has high response quick recovery time and selectivity to the ethanol vapor.

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