Formaldehyde Sensing Using ZnO Nanorods Coated Glass Integrated With Microfiber

Jali, Mohd Hafiz and Harun, Sulaiman Wadi and Mohd Yusof, Haziezol Helmi and Md Johari, Md Ashadi and Abdul Rahim, Hazli Rafis and Rahman, B. M.Azizur and Yasin, Mohamad (2019) Formaldehyde Sensing Using ZnO Nanorods Coated Glass Integrated With Microfiber. Optics and Laser Technology, 120. pp. 1-9. ISSN 0030-3992

Text FORMALDEHYDE SENSING USING ZNO NANORODS COATED GLASS INTEGRATED WITH MICROFIBER.PDF Restricted to Registered users only Download (2MB)

Abstract

A proposed formaldehyde (CH2O) sensor is fabricated by exploiting evanescent wave on a glass surface coated with Zinc Oxide (ZnO) nanorods integrated with microfiber. The diameter of silica fiber is reduced by tapering using flame brushing technique to a waist diameter of 6 µm. The glass surface was coated with ZnO nanorods using hydrothermal synthesis method. A significant response to formaldehyde concentrations from 0 ppm to 0.18 ppm was observed due to strong chemisorption process and changeable refractive index of the ZnO nanorods coated glass surface. Thus, the output power of the proposed sensor has reduced linearly from −22.64 dBm to −24.24 dBm with sensitivity and resolution of 9.78 dBm/ppm and 0.0016 ppm respectively. Sensitivity improved by a factor of 3 and the resolution by a factor of 2.5 when the glass surface is coated as compared to uncoated glass surface. The proposed formaldehyde sensor exploit the distinctive features of strong evanescent wave from silica microfiber and surface absorption capability of ZnO nanorods coated glass surface which eased the handling procedure during the synthesis process and sensing applications. Based on the experimental result, the proposed sensor has demonstrated an excellent sensing performance as a formaldehyde sensor.

Item Type:	Article
Uncontrolled Keywords:	Formaldehyde sensing, ZnO, Nanorods coated glass, Microfiber, Glass surface, Zinc Oxide nanorods
Divisions:	Faculty of Electrical Engineering
Depositing User:	Sabariah Ismail
Date Deposited:	04 Aug 2020 12:31
Last Modified:	04 Aug 2020 12:31
URI:	http://eprints.utem.edu.my/id/eprint/24275
Statistic Details:	View Download Statistic

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