ZnO nanorods coated tapered u-shape plastic optical fiber for relative humidity detection

Harun, Sulaiman Wadi and Johari, Siti Halma and Tiu, Zian Cheak and Md Johari, Md Ashadi and Mohd Yusof, Haziezol Helmi and Jali, Mohd Hafiz and Abdul Rahim, Hazli Rafis and Yasin, Moh (2022) ZnO nanorods coated tapered u-shape plastic optical fiber for relative humidity detection. Photonics, 9 (11). pp. 1-12. ISSN 2304-6732

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Abstract

A relative humidity sensor was fabricated by exploiting an evanescent wave (EW) on a U-bent tapered plastic optical fiber (POF) coated with zinc oxide (ZnO) nanorods. The POF was tapered manually using a polishing method to a diameter of 0.5 mm, a length of 5 cm, and a radius of 5 cm. ZnO nanorods were synthesized using a hydrothermal method and grown on the POF by a seeding process for 12 h. A significant response of the sensor was observed when the sensor was exposed to 35 to 90%RH due to the intense chemisorption process and changeable relative index in the POF. The sensitivity and resolution of the sensor have been improved by factors of 1.23 and 2.18, respectively, compared to the conventional tapered POF sensor without ZnO coating. Besides, the ZnO-coated sensor also exhibited better repeatability properties in terms of output voltage when exposed to 35 to 90%RH for three repeated measurements. The obtained results revealed that the proposed new POF sensor has an excellent sensing performance as an RH sensor in terms of sensitivity, repeatability, and stability properties

Item Type:	Article
Uncontrolled Keywords:	evanescence wave sensor, tapered plastic optical fiber, zinc oxide nanorods, humidity sensing
Divisions:	Faculty of Electrical and Electronic Engineering Technology
Depositing User:	Norfaradilla Idayu Ab. Ghafar
Date Deposited:	12 Apr 2023 10:19
Last Modified:	12 Apr 2023 10:19
URI:	http://eprints.utem.edu.my/id/eprint/26519
Statistic Details:	View Download Statistic

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