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Journal of Sensors
Volume 2015, Article ID 971473, 9 pages
http://dx.doi.org/10.1155/2015/971473
Research Article

Electrophoretic Deposition of SnO2 Nanoparticles and Its LPG Sensing Characteristics

1Department of Ceramics and Glass, Anadolu University, 26470 Eskisehir, Turkey
2Department of Mechanical Engineering, Ondokuz Mayıs University, 55139 Samsun, Turkey
3Department of Materials Science and Engineering, Anadolu University, 26555 Eskisehir, Turkey

Received 26 December 2014; Revised 1 April 2015; Accepted 12 April 2015

Academic Editor: Chandra K. Dixit

Copyright © 2015 Göktuğ Günkaya et al. 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.

Abstract

Homogenized nanoparticles (60 nm) in acetylacetone mediums, both with and without iodine, were deposited onto platinum coated alumina substrate and interdigital electrodes using the electrophoretic deposition (EPD) method for gas sensor applications. Homogeneous and porous film layers were processed and analyzed at various coating times and voltages. The structure of the deposited films was characterized by a scanning electron microscopy (SEM). The gas sensing properties of the films were investigated using liquid petroleum gas (LPG) for various lower explosive limits (LEL). The results showed that porous, crack-free, and homogeneous films were achieved for 5 and 15 sec at 100 and 150 V EPD parameters using an iodine-free acetylacetone based suspension. The optimum sintering for the deposited nanoparticles was observed at 500°C for 5 min. The results showed that the sensitivity of the films was increased with the operating temperature. The coated films with EPD demonstrated a better sensitivity for the 20 LEL LPG concentrations at a 450°C operating temperature. The maximum sensitivity of the sensors at 450°C to 20 LEL LPG was 30.