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Sensors 2014, 14(7), 12219-12232; doi:10.3390/s140712219

A Rapid Process for Fabricating Gas Sensors

*  and
Department of Mechanical Design Engineering, National Formosa University, No. 64, Wunhua Rd., Huwei Township, Yunlin County 632, Taiwan
* Author to whom correspondence should be addressed.
Received: 4 June 2014 / Revised: 30 June 2014 / Accepted: 1 July 2014 / Published: 9 July 2014
(This article belongs to the Section Physical Sensors)
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Zinc oxide (ZnO) is a low-toxicity and environmentally-friendly material applied on devices, sensors or actuators for “green” usage. A porous ZnO film deposited by a rapid process of aerosol deposition (AD) was employed as the gas-sensitive material in a CO gas sensor to reduce both manufacturing cost and time, and to further extend the AD application for a large-scale production. The relative resistance change (△R/R) of the ZnO gas sensor was used for gas measurement. The fabricated ZnO gas sensors were measured with operating temperatures ranging from 110 °C to 180 °C, and CO concentrations ranging from 100 ppm to 1000 ppm. The sensitivity and the response time presented good performance at increasing operating temperatures and CO concentrations. AD was successfully for applied for making ZnO gas sensors with great potential for achieving high deposition rates at low deposition temperatures, large-scale production and low cost.
Keywords: gas sensor; aerosol deposition; carbon monoxide; zinc oxide gas sensor; aerosol deposition; carbon monoxide; zinc oxide
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Hsiao, C.-C.; Luo, L.-S. A Rapid Process for Fabricating Gas Sensors. Sensors 2014, 14, 12219-12232.

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