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dc.contributor.authorTan, Rex Xiaoen
dc.contributor.authorYap, Stephanie Hui Kiten
dc.contributor.authorTan, Yung Chuenen
dc.contributor.authorTjin, Swee Chuanen
dc.contributor.authorIbsen, Mortenen
dc.contributor.authorYong, Ken Tyeen
dc.contributor.authorLai, Wenn Jingen
dc.identifier.citationTan, R. X., Yap, S. H. K., Tan, Y. C., Tjin, S. C., Ibsen, M., Yong, K. T., et al. (2018). Functionalized fiber end superstructure fiber bragg grating refractive index sensor for heavy metal ion detection. Sensors, 18(6), 1821-.en
dc.description.abstractWe present a novel superstructure fiber Bragg grating fiber end sensor capable of detecting variations in refractive index (RI) of liquids and potentially that of gases, and demonstrated an application in the detection of heavy metal ions in water. The sensor is capable of sensing RI variations in the range of 1.333 to 1.470 with good sensitivity of up to 230 dB/RIU achieved for the RI range of 1.370 to 1.390. The sensor is capable of simultaneously measuring variations in ambient temperature along with RI. A simple chemical coating was employed as a chelating agent for heavy metal ion detection at the fiber end to demonstrate an possible application of the sensor. The coated fiber sensor can conclusively detect the presence of heavy metal ions with concentrations upwards of 100 ppm. RI sensing capability of the sensor is neither affected by temperature nor strain and is both robust and easily reproducible.en
dc.format.extent13 p.en
dc.rights© 2018 by The Author(s). Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (
dc.subjectFiber Bragg Gratingsen
dc.subjectFiber Sensorsen
dc.titleFunctionalized fiber end superstructure fiber bragg grating refractive index sensor for heavy metal ion detectionen
dc.typeJournal Articleen
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen
dc.contributor.researchTemasek Laboratoriesen
dc.description.versionPublished versionen
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