Table of Contents
Journal of Nanoscience
Volume 2013, Article ID 540741, 4 pages
Research Article

Linear Sensing Response to Ethanol by Indium Oxide Nanoparticle Layers

1CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi 110012, India
2Department of Civil Engineering, Amity School of Engineering and Technology, Amity University Uttar Pradesh, Noida 201303, India

Received 10 August 2013; Accepted 26 August 2013

Academic Editor: Kalimuthu Kalishwaralal

Copyright © 2013 Vidya N. Singh and Ganesan Partheepan. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Indium oxide nanoparticles having well-defined particle sizes were synthesized using a chemical capping method. These nanoparticles were used for making the nanoparticle layers without altering the size and morphology of these particles. These nanoparticles and nanoparticle layers were characterized using XRD, TEM, HRTEM and AFM. The ethanol sensing behavior of the nanoparticle layers were studied at different ethanol concentrations. It was observed that the sensor response was linear to the ethanol concentration in the range of 10–1000 ppm. The ethanol sensing behavior has been explained on the basis of the creation of a depletion region due to the adsorbed oxygen and release of the electron in the conduction band in the presence of ethanol (as it takes away the adsorbed oxygen). The explanation has been supported by EDAX results.