Temperature-independent relative humidity sensing properties of polymer micro-bottle resonators coated with graphene oxide

Li, Hou-Chang, Wang, Meng-Yu, Liu, Bin, Liu, Juan, Wang, Qi, He, Xing-Dao, Ping Chan, Hau, Wang, Danling, Yuan, Jinhui and Wu, Qiang (2022) Temperature-independent relative humidity sensing properties of polymer micro-bottle resonators coated with graphene oxide. Measurement, 196. p. 111199. ISSN 0263-2241

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Official URL: https://doi.org/10.1016/j.measurement.2022.111199

Abstract

A polymer-based micro-bottle resonator coated with graphene oxide (GO) film is presented to improve the relative humidity (RH) sensing performance. Polymeric material Loctite 3525 was coated onto a quartz fiber and cured by using UV light irradiation and thermal reflow technology. A layer of GO film was prepared on the micro-bottle resonator by the dip impregnation method, which realized a high Q-factor (>104) transmission of energy by appropriately designing a wave-guide resonator coupling. By optimizing the concentration of GO dip impregnation solution, high sensitivity and figure of merit (FoM) of 0.161 nm/%RH and 2.01/%RH were achieved in the RH range of 22–81%. In addition, after high-temperature annealing at 300 °C, the temperature sensitivity decreased by an order of magnitude from 0.793 nm/°C to 0.068 nm/°C, which significantly reduces the cross-sensitivity between humidity and temperature. The proposed resonator has the advantages of being compact in size, low in cost, high sensitivity, and low in temperature crosstalk.

Item Type: Article
Additional Information: Funding information: This work was jointly supported by National Natural Science Foundation of China (NSFC) (11864025, 62065013, 61865013, 62175097); Natural Science Foundation of Jiangxi Province (Grant No. 20212BAB202024 and 20192ACB20031), Key R&D Projects of the Ministry of Science and Technology of China (2018YFE0115700).
Uncontrolled Keywords: Relative humidity, Micro-bottle resonator, Polymer material, whispering-gallery Mode (WGM), Graphene oxide
Subjects: H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Elena Carlaw
Date Deposited: 03 May 2022 15:46
Last Modified: 03 May 2022 16:00
URI: http://nrl.northumbria.ac.uk/id/eprint/49022

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