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Single-mode fiber coated with zinc oxide (ZnO) nanorods for H gas sensor applications

Saidin, Norazlina and Idris, Nur Farahi and Yaacob, Mohd Hanif and Harun, Sulaiman Wadi and Md Ralib @ Md Raghib, Aliza 'Aini and Hasbullah, Nurul Fadzlin (2019) Single-mode fiber coated with zinc oxide (ZnO) nanorods for H gas sensor applications. In: 2019 IEEE International Conference on Sensors and Nanotechnology, 24 - 25 July 2019, Penang Island.

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Abstract

A Hydrogen (H2) gas sensor was successfully developed using optical fiber coated with Zinc Oxide (ZnO) nanorods. The single-mode fiber (SMF) used as a sensing device has been prepared by etching the SMF fiber and coated with ZnO nanorods. The etching of the fiber was performed using hydrofluoric acid (HF) to enhance the evanescent field around the fiber core. The ZnO nanorods were prepared by hydrothermal method through seeding and growth solution technique. The diameter of cladding and core are 125 µm and 8 µm, respectively, before etching and goes down to 11 µm after etching. Around 2 cm of ZnO nanorods were coated in the middle of the etched fiber. The sensing layer was characterized through Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray (EDX) and X-Ray Diffraction (XRD) to verify the properties of ZnO. The developed sensor’s response and recovery time were observed to be 7 min and 3 min, respectively, for a low concentration of 0.25% H2 gas. The aim of this study is to understand the gas sensing properties towards the spectral intensity variations in etched optical fiber coated with ZnO nanorods. Keywords—hydrogen sensor; fiber-optic sensor; ZnO nanorods; hydrothermal method

Item Type: Conference or Workshop Item (Plenary Papers)
Additional Information: 5653/79683
Uncontrolled Keywords: hydrogen sensor; fiber-optic sensor; ZnO nanorods; hydrothermal method
Subjects: T Technology > T Technology (General)
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering
Kulliyyah of Engineering > Department of Electrical and Computer Engineering
Depositing User: Norazlina Saidin
Date Deposited: 20 Mar 2020 11:59
Last Modified: 15 Jul 2020 11:20
URI: http://irep.iium.edu.my/id/eprint/79683

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