Optimization of sensing performance factor (γ) based on microfiber-coupled ZnO nanorods humidity scheme

Harun, Sulaiman Wadi and Yasin, Moh and Md Johari, Md Ashadi and Abdul Rahim, Hazli Rafis and Jali, Mohd Hafiz and Mohd Yusof, Haziezol Helmi and Thokchom, Siddharth (2019) Optimization of sensing performance factor (γ) based on microfiber-coupled ZnO nanorods humidity scheme. Optical Fiber Technology, 52. pp. 1-11. ISSN 1068-5200

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Abstract

An optimization method of the proposed humidity sensing scheme comprises of silica microfiber laid on a glass surface coated with Zinc Oxide (ZnO) nanorods is reported. The silica microfibers were tapered into several waist diameters of 6 µm, 8 µm, 10 µm and 12 µm using flame brushing technique, while the glass surface was coated with ZnO nanorods using hydrothermal method for 6 h, 9 h, 12 h, 15 h and 18 h of growth time. The samples were exposed to the different humidity level ranging from 35%RH to 85%RH to observe several performance parameters such as scattering coefficient (α), sensing performance factor γ, output light intensity and ultimately the sensitivity. 12-h growth sample exhibited the optimum results in term of α, γ , output light intensity and sensitivity towards the %RH level. The sensitivity improved by a factor of 1.3 as compared to the closest best sample. Besides that, it was found that 6 µm waist diameter microfiber sample produced optimum result in term α, γ and sensitivity towards the %RH level. The sensitivity improved by a factor of 1.1 as compared to the closest best sample. The work provided the best optimization method for microfiber and ZnO nanorods samples for the proposed humidity sensing scheme. It utilized the distinctive features of the scattering and surface absorption capability of the microfiber and ZnO nanomaterials coated glass surface to couple with the surrounding water molecules for humidity sensing

Item Type:	Article
Uncontrolled Keywords:	Optimization method for the proposed humidity sensor, Humidity sensor based on microfiber laid on a glass surface coated with ZnO nanorods., ZnO nanorods growth using hydrothermal method, Scattering and evanescent wave absorption capability.
Divisions:	Faculty of Electrical Engineering
Depositing User:	Norfaradilla Idayu Ab. Ghafar
Date Deposited:	22 Dec 2020 12:18
Last Modified:	22 Dec 2020 12:18
URI:	http://eprints.utem.edu.my/id/eprint/24213
Statistic Details:	View Download Statistic

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