Formaldehyde Sensing Using Micro-Loop Resonator

• Main Authors: Mohd Hafiz Jali, .-, Hazli Rafis Abdul Rahim, .-, Sana Sulaiman Hamid, .-, Md Ashadi Md Johari, .-, Haziezol Helmi Mohd Yusof, .-, Sulaiman Wadi Harun, .-
• Format: Book Section PeerReviewed
• Language: English; English; English
• Published: AIP Publishing
• Subjects: Q Science; Q Science (General); QD Chemistry
• Online Access: https://repository.unair.ac.id/126006/1/C35.%20Fulltext.pdf; https://repository.unair.ac.id/126006/2/C35.%20Penilaian%20dan%20Validasi.pdf; https://repository.unair.ac.id/126006/3/C35.%20Similarity.pdf; https://repository.unair.ac.id/126006/; https://pubs.aip.org/aip/acp/article/2314/1/030004/724374/Formaldehyde-sensing-using-micro-loop-resonator
• Institution: Universitas Airlangga

Formaldehyde (CH2O) liquid sensor has been successfully fabricated using micro-loop resonator (MLR) based on whispering gallery mode (WGM) concept. An excellent sensing response towards formaldehyde liquid concentrations level ranging from 0% to 5% was observed. It is because of the changeable effective index and surface absorption phenomenon which lead to different light characteristic inside the MLR. The output power reduced linearly from -18.9 dBm to -36.2.dBm as the concentration increases. The sensitivity obtained was 3.6561 dBm/% with linearity of 99.1% and resolution of 0.0207%. The proposed sensor has simplicity, easy fabrication, better resolution and low cost. This application is essential in monitoring toxic gases and human health.