Improve Formaldehyde Vapor Sensing

Authors

  • NORHAFIZAH BURHAM UNIVERSITI TEKNOLOGI MARA
  • NAIMAH MAT ISA Universiti Teknologi MARA
  • AZIATI BINTI AWANG Universiti Teknologi MARA
  • Amir Syazwan Tukiman Universiti Teknologi MARA

DOI:

https://doi.org/10.53655/joe.u9646m

Keywords:

Tapered optical fiber, Formaldehyde, Rhenium Disulfide, sensitivity

Abstract

Formaldehyde (CH₂O) is a toxic, colourless, and flammable gas that is widely used in various industries and household products. Current formaldehyde  detection methods often suffer from limitations such as low sensitivity, high cost, and impracticality for widespread use in residential and industrial  settings. This study focuses on evaluating the performance of uncoated and Rhenium Disulfide (ReS₂)-coated tapered optical fibers (TOFs) in detecting formaldehyde, using fibers with a waist diameter of 10 µm and a length of 3 mm. The experimental evaluation was conducted by exposing the TOFs to formaldehyde vapor concentrations of 1%, 2%, 3%, 4%, and 5%, under relative humidity conditions ranging from 30% to 90%. The results show that the ReS₂-coated TOFs demonstrated better sensitivity in detecting formaldehyde compared to uncoated TOFs with measured sensitivities of –0.03245 dBm/% and –0.00371 dBm/% at 5% formaldehyde concentration. Overall, formaldehyde sensing performance can be improved by coating the TOFs with ReS₂, with sensitivity increasing by more than 80% compared to the uncoated fibers.

References

S. Aftab et al., “ReSe2/metal interface for hydrogen gas sensing,” Journal of Colloid and Interface Science, vol. 603, pp. 511–517, Dec. 2021, ISSN: 0021-9797. DOI: 10.1016/j.jcis.2021.06.117

S. H. Johari et al., “Formaldehyde Sensing Using Tapered U-Shape Plastic Optical Fiber Coated With Zinc Oxide Nanorods,” IEEE Access, vol. 10, pp. 91 445–91 451, 2022, ISSN: 2169-3536. DOI: 10.1109/access.2022.3202176

N. Burham, N. Ali, M. A. A. Mazlan, M. R. A. Rizal, A. H. Awang, and N. Arsad, “Optimization of tapered microfiber humidity sensors with molybdenum disulfide coating,” International Journal of Nanoelectronics and Materials (IJNeaM), vol. 18, no. 2, pp. 230–235, May 2025, ISSN: 1985-5761. DOI: 10.58915/ijneam.v18i2.2121

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Published

01-12-2025

How to Cite

BURHAM, N., MAT ISA, N., BINTI AWANG, A., & Tukiman, A. S. (2025). Improve Formaldehyde Vapor Sensing. Jurnal OptoElektronik, 1–3. https://doi.org/10.53655/joe.u9646m

Issue

Volume 4 (2025)

Section

TMP2025: Invited

License

Copyright (c) 2025 NORHAFIZAH BURHAM, NAIMAH MAT ISA, AZIATI BINTI AWANG, Amir Syazwan Tukiman

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