PMMA microfiber loop resonator for humidity sensor

Irawati, Ninik and Abdullah, Tengku Normalini Raja and Rahman, Husna Abdul and Ahmad, Harith and Harun, Sulaiman Wadi (2017) PMMA microfiber loop resonator for humidity sensor. Sensors and Actuators A: Physical, 260. pp. 112-116. ISSN 0924-4247, DOI

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A PMMA microfiber loop resonator (PMLR) coated with zinc oxide (ZnO) nanostructure is proposed and demonstrated for the monitoring of relative humidity. The PMLR has a loop diameter of 56 μm and was fabricated using direct drawing technique using a 6 μm diameter PMMA microfiber. The results showed an increase in the sensitivity of the sensor with the additional coating of ZnO nanostructure on the surface of the PMMA fiber. The working mechanism of the device is based on the observed decrement in the transmission of the sensor that was carefully placed in a sealed chamber. As the relative humidity level varies from 20% to 80%, the output power of the PMLR with ZnO nanostructure coating decreases linearly from −9.57 dB m to −20.19 dBm with a maximum sensitivity, linearity and resolution of 0.1746 dBm/%, 94% and 6.17%, respectively. This work is highly beneficial as it combines the high sensitivity obtained by using traditional silica fibers but with the ruggedness and flexibility of PMMA fibers, making them highly suitable for continuous monitoring of relative humidity in compact areas.

Item Type: Article
Funders: University of Malaya High Impact Research Grant (Grant No. D000009-16001), grant schemes (Grant No: PG024-2014A and PG105-2014B), Indonesia Endowment Fund for Education Grant No. PRJ-782/LPDP.3/2016
Uncontrolled Keywords: Polymethyl methacrylate (PMMA); PMMA microfiber loop resonator (PMLR); Relative humidity; Zinc oxide nanostructure
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Faculty of Science > Department of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 23 Nov 2018 08:21
Last Modified: 23 Nov 2018 08:21

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