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Proceedings Paper

Chitosan-hydrogel-based fiber optic sensor for heavy metal ion detection
Author(s): Raghunandhan Ravikumar; Li Han Chen; Chi Chiu Chan; Ping Lam So; Zhi Qiang Tou; Zu Peng
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Paper Abstract

A no-core fiber (NCF) based intermodal sensor for nickel ion (Ni2+) detection is proposed. Bilayers of chitosan and Poly Acrylic acid (PAA) functionalized on the sensor surface serve as adsorption sites for nickel ions thereby causing change in refractive index (RI) along the cladding bilayer boundary. Nickel adsorption at different concentrations was monitored continuously through measurement of wavelength shifts. As observed, the proposed sensor exhibits Ni2+ detection sensitivity of 0.0237 nm/μM.

Paper Details

Date Published: 28 September 2015
PDF: 4 pages
Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96344O (28 September 2015); doi: 10.1117/12.2194804
Show Author Affiliations
Raghunandhan Ravikumar, Nanyang Technological Univ. (Singapore)
Li Han Chen, Nanyang Technological Univ. (Singapore)
Chi Chiu Chan, Nanyang Technological Univ. (Singapore)
Ping Lam So, Nanyang Technological Univ. (Singapore)
Zhi Qiang Tou, Nanyang Technological Univ. (Singapore)
Zu Peng, Nanyang Technological Univ. (Singapore)

Published in SPIE Proceedings Vol. 9634:
24th International Conference on Optical Fibre Sensors
Hypolito José Kalinowski; José Luís Fabris; Wojtek J. Bock, Editor(s)

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