Relative humidity sensor employing tapered plastic optical fiber coated with seeded Al-doped ZnO

Harith, Zuraidah and Batumalay, Malathy and Irawati, Ninik and Harun, Sulaiman Wadi and Arof, Hamzah and Ahmad, Harith (2017) Relative humidity sensor employing tapered plastic optical fiber coated with seeded Al-doped ZnO. Optik, 144. pp. 257-262. ISSN 0030-4026

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Official URL: http://dx.doi.org/10.1016/j.ijleo.2017.06.123

Abstract

A relative humidity sensor operating on intensity modulation principle is proposed and demonstrated using a tapered plastic optical fiber (POF) that is coated with seeded Al-doped ZnO nanostructures. The POF was tapered by mechanical etching and then coated with seeded Al-doped ZnO nanostructures using sol-gel immersion method with different mol% of Al nitrate that acted as dopant. It was found that 1 mol% of Al nitrate produced the best performance compared to other doping concentrations. Then the performances of sensors fabricated using seeded and non-seeded coating methods with 1 mol% of Al-doped ZnO were compared and investigated. The sensor developed using seeded coating method showed a better sensitivity of 0.0386 mV/%, as opposed to the other sensor which registered a sensitivity of 0.0148 mV/%. The results show that tapered POF with Al-doped ZnO nanostructures deposited using seeded coating method is excellent for detecting changes in relative humidity.

Item Type: Article
Uncontrolled Keywords: Al-doped zinc oxide; Fiber optic sensor; Tapered plastic optical fiber; Relative humidity (RH) sensor
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Faculty of Science > Dept of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 04 Aug 2017 07:12
Last Modified: 16 Oct 2018 03:44
URI: http://eprints.um.edu.my/id/eprint/17636

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