Humidity sensing using microfiber-ZnO nanorods coated glass structure

Jali, Mohd Hafiz and Rahim, Hazli Rafis Abdul and Johari, Md Ashadi Md and Yusof, Haziezol Helmi Mohd and Ahmad, Aminah and Thokchom, Siddharth and Dimyati, Kaharudin and Harun, Sulaiman Wadi (2021) Humidity sensing using microfiber-ZnO nanorods coated glass structure. Optik, 238. ISSN 0030-4026, DOI

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In this paper, a proposed humidity sensor is fabricated by integrating the microfiber and the glass surface coated with Zinc Oxide (ZnO) nanorods. The silica fiber diameter was reduced to 6 mu m using the flame brushing technique, and the glass surface was coated with ZnO nanorods using a hydrothermal method. A significant response to humidity level concentration ranging from 35 % RH to 85 %RH has been observed. The proposed sensor's output power has decreased linearly from -16.32 dB m to -18.68 dB m with a linearity of 95.87 %. The sensitivity and the resolution of the ZnO coated glass improved by a factor of 2.8 and 7.5, respectively, as compared to the uncoated glass substrate. The proposed humidity sensor successfully employs the interaction between the ZnO nanorods surface and the microfiber's evanescent field from the microfiber, which reduce the striving effort in handling the microfiber during the synthesis process. The proposed sensor has shown an excellent sensing performance as a humidity sensor based on the experimental results.

Item Type: Article
Funders: Ministry of Education, Malaysia, Universiti Teknikal Malaysia Melaka [Grant No: FRGS/2018/FKEKK-CETRI/F00359 & JURNAL/2019/FKE/Q00045], Universiti Malaya [Grant No: IIRG005C-1191SS]
Uncontrolled Keywords: Zinc oxide nanorods; Microfiber; Hydrothermal; Flame brushing technique; Evanescent field; Humidity sensor
Subjects: R Medicine > RE Ophthalmology
Divisions: Faculty of Engineering > Department of Electrical Engineering
Depositing User: Ms Zaharah Ramly
Date Deposited: 24 Jun 2022 02:13
Last Modified: 24 Jun 2022 02:13

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