Bio-Inspired Localized Surface Plasmon Resonance Enhanced Sensing of Mercury Through Green Synthesized Silver Nanoparticle

• Published in: Journal of lightwave technology Vol. 38; no. 7; pp. 2086 - 2091
• Main Authors: Boruah, Bijoy Sankar, Ojah, Namita, Biswas, Rajib
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.04.2020; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Aqueous solutions; Biomedical optical imaging; Chitosan; Contaminants; Detection; Gold; green synthesis; Heavy metals; Ions; Linearity; mercury; Mercury (metal); Mercury surface; Metals; Nanoparticles; Optical sensors; Probes; Selectivity; Silver; silver nanoparticles; Surface plasmon resonance; U-shaped probe
• ISSN: 0733-8724; 1558-2213
• DOI: 10.1109/JLT.2020.2971252

We report sensing of mercury ion through localized surface plasmon resonance based intensity modulation. A U-shaped probe is utilized for this purpose that is functionalized with Chitosan mediated silver nanoparticles. The nanoparticles have been synthesized through a green route. The as-synthesized silver nanoparticles are found to be ∼44 nm, as affirmed by absorption curves and DLS experiment. Subject to the dipping of as- fabricated probe in various heavy metal ion solutions, we attain excellent selectivity towards mercury. The sensing offers a limit of detection of 1.5 ppb with an excellent linearity ∼0.97. The eco-friendly as well as cost-effective with simplistic design approach has enough potential for the application in real time monitoring of heavy metal contaminants in aqueous solutions.