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Graphene coated optical fiber tip sensor for nitrate sensing application

Said Ja'Afar, Puteri Nadiah S. and M. Razali, N. and Zaidi, N. F. A. and Ahmad, F. and Omar, M. F. and Ismail, A. K. and Rosdi, N. and Yaacob, M. H. and Hamzah, A. and M. Kaidi, H. and Ambran, S. (2020) Graphene coated optical fiber tip sensor for nitrate sensing application. In: 8th IEEE International Conference on Photonics, ICP 2020, 16 May 2020 - 18 May 2020, Kota Bharu, Kelantan, Malaysia.


Official URL: http://dx.doi.org/10.1109/ICP46580.2020.9206450


An optical fiber tip sensing probe coated with graphene is proposed for nitrate-sensing application. The sensor was coated with graphene using dip-casting method to detect nitrate at different concentrations ranging from 0 to 50 ppm. The graphene-coated fiber tip sensor was highly sensitive in detecting nitrate ion. When the concentration of the nitrate solution was dropped onto the sensing region, the reflected optical power decreased as the nitrate concentration increased. Without the graphene layer, the uncoated fiber tip sensor only had a sensitivity of 0.0076 dBm/ppm. However, the coated sensor's sensitivity was significantly enhanced to 0.0624 dBm/ppm, eight times higher than the uncoated fiber tip sensor, mainly due to the adsorption of nitrate on the graphene surface. This graphene-coated optical fiber tip sensor has a high potential to be used in nitrate-sensing applications.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:graphene, nitrate, optical fiber tip sensor, sensitivity
Subjects:Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
T Technology > TP Chemical technology
Divisions:Malaysia-Japan International Institute of Technology
ID Code:90870
Deposited By: Yanti Mohd Shah
Deposited On:31 May 2021 21:40
Last Modified:31 May 2021 21:40

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