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Inventions 2016, 1(4), 21; doi:10.3390/inventions1040021

A ZnO Nanoparticle-Coated Long Period Fiber Grating as a Carbon Dioxide Gas Sensor

Department of Mechanical Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung 807, Taiwan
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Author to whom correspondence should be addressed.
Academic Editor: Chien-Hung Liu
Received: 20 July 2016 / Revised: 22 September 2016 / Accepted: 17 October 2016 / Published: 26 October 2016
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Abstract

This study proposes a long period fiber grating (LPFG) with a zinc oxide (ZnO) nanoparticle layer for use as a carbon dioxide (CO2) gas sensor. Inductively coupled plasma (ICP) etching, corona treatment, and electrostatic spraying were used to fabricate this ZnO nanoparticle-coated LPFG CO2 gas sensor. Repeated gas sensor tests showed that, when a 15% CO2 mixture was injected (0.2 L/min) into a closed chamber into which the sensor had been placed, the CO2 gas was absorbed by the ZnO nanoparticle-coated LPFG sensor. In these tests, the transmission loss gradually decreased, and the maximum transmission loss was 2.039 dB. The concentration test results showed that as the concentration of CO2 introduced into the chamber was increased, the rate of the transmission loss change was increased in direct proportion. In addition, the sensitivity was 0.0513 dB/%. The results confirm that this low-cost ZnO nanoparticle-coated LPFG gas sensor was successfully applied to the measurement of CO2 gas. Therefore, the proposed ZnO nanoparticle-coated LPFG can be used to measure CO2 gas. View Full-Text
Keywords: long period fiber grating; inductively coupled plasma etching; carbon dioxide; electrostatic spraying long period fiber grating; inductively coupled plasma etching; carbon dioxide; electrostatic spraying
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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. (CC BY 4.0).

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Wu, C.-W.; Wu, C.-C.; Chiang, C.-C. A ZnO Nanoparticle-Coated Long Period Fiber Grating as a Carbon Dioxide Gas Sensor. Inventions 2016, 1, 21.

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