Optical fiber sensor based on magneto-plasmonic features of Ag-Co nanostructure for ppm ammonium detection in aqueous solutions
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Authors
Samavati, ZahraBorhani, Tohid N
Samavati, Alireza
Ismail, Ahmad Fauzi
Rahman, Mukhlis A
Othman, Mohd Hafiz Dzarfan
Soleymani, Meysam
Affiliation
Faculty of Science and Engineering, University of Wolverhampton, Wolverhampton WV1 1LY, United KingdomIssue Date
2021-11-03
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Magneto-plasmonic nanocomposite deposition enables fiber optic sensors to detect water pollution caused by chemical contaminants of ammonium that is harmful to human and aquatic organisms as well. In this study, Ag-Co nanocomposite was deposited on unclad multimode glass fiber to distinguish the ammonium concentration in the aqueous medium. Prior to the fabrication of the fiber probe, for finding the stronger surface plasmon resonance (SPR) effect, Ag-Co nanocomposite (which had different structures) was deposited on the glass prism. The maximum SPR shift of 7.16° was observed by varying the ammonium concentration from 0 to 80 ppm, when Ag was deposited as the outer layer and Co acted as the inner layer. The working principle of the sensor was based on manipulating the analyte viscosity with the magnetization of Co nanolayer exposed to the external magnetic field and adjusting the SPR conditions via the interaction of different ammonium concentrations with the Ag layer. Spectral wavelength and the intensity interrogation technique in the visible region confirmed the detection of ammonium in the solution with sensitivity, response time, limit of detection (LOD), and recovery time of 0.131 nm/ppm, 17 s, 2.9 ppm, and 12 s, respectively. These features together with a high selectivity make the proposed sensor a potential candidate for determining the environmental pollution, controlling the industrial safety requirements, and accurately measuring the water quality in daily life.Citation
Wanniarachchi, T. C., Arjunan, A., Baroutaji, A. & Singh, M. (2022) Mechanical performance of additively manufactured cobalt-chromium-molybdenum auxetic meta-biomaterial bone scaffolds, Journal of the Mechanical Behavior of Biomedical Materials, Article No. 105409, https://doi.org/10.1016/j.jmbbm.2022.105409.Publisher
Elsevier BVJournal
Optical Fiber TechnologyType
Journal articleLanguage
enDescription
This is an accepted manuscript of an article published by Elsevier in Optical Fiber Technology on 03/11/2021, available online: https://doi.org/10.1016/j.yofte.2021.102730 The accepted version of the publication may differ from the final published version.ISSN
1068-5200EISSN
1095-9912ae974a485f413a2113503eed53cd6c53
10.1016/j.yofte.2021.102730
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Except where otherwise noted, this item's license is described as https://creativecommons.org/licenses/by-nc-nd/4.0/