Selective detection of lead in water using etched fiber Bragg grating sensor

Kumar N, V and BS, K and Asokan, S (2022) Selective detection of lead in water using etched fiber Bragg grating sensor. In: Sensors and Actuators B: Chemical, 354 .

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Abstract

In this work, we demonstrate a maleic acid (MA) functionalized gold nanoparticle (AuNP) coated, clad etched-fiber Bragg grating (e-FBG) sensor, capable of detecting lead metal ion (Pb2+) in water. The self-assembled carboxylic group in MA-AuNP shows an assertive coordination behavior towards Pb2+ for selective detection through a Bragg wavelength shift. The limit of detection (LOD) is found to be 10 femtomolar (fM, 0.0000002 ppb) with a dynamic range up to 100 nanomolar (nM, 20.72 ppb), which is within the acceptable limit stipulated by the World Health Organization (WHO) for safe drinking water (10 ppb). The sensor's recovery concentration is > 90 for spiked real water samples. A good reproducibility (standard error < 10 pm) and specificity along with portability, small footprint and real time response make e-FBG sensor an ideal optical probe for drinking water. © 2021 Elsevier B.V.

Item Type:	Journal Article
Publication:	Sensors and Actuators B: Chemical
Publisher:	Elsevier B.V.
Additional Information:	The copyright for this article belongs to Elsevier B.V.
Keywords:	Chemical detection; Electric sensing devices; Fiber Bragg gratings; Fiber optic sensors; Gold nanoparticles; Metal ions; Potable water; Probes, Etched fiber bragg grating; Etched fiber bragg grating sensor; Fiber Bragg Grating Sensors; Functionalized gold nanoparticles; Lead metals; Lead sensing; Maleic acids; Optical probe; Safe drinking water; Selective detection, Metal nanoparticles
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	07 Jan 2022 07:00
Last Modified:	07 Jan 2022 07:00
URI:	http://eprints.iisc.ac.in/id/eprint/70912

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