Chitosan-hydrogel-based fiber optic sensor for heavy metal ion detection

Raghunandhan Ravikumar; Li Han Chen; Chi Chiu Chan; Ping Lam So; Zhi Qiang Tou; Zu Peng

doi:10.1117/12.2194804

28 September 2015 Chitosan-hydrogel-based fiber optic sensor for heavy metal ion detection

Raghunandhan Ravikumar, Li Han Chen, Chi Chiu Chan, Ping Lam So, Zhi Qiang Tou, Zu Peng

Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 96344O (2015) https://doi.org/10.1117/12.2194804
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil

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.

Citation Download Citation

Raghunandhan Ravikumar, Li Han Chen, Chi Chiu Chan, Ping Lam So, Zhi Qiang Tou, and Zu Peng "Chitosan-hydrogel-based fiber optic sensor for heavy metal ion detection", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96344O (28 September 2015); https://doi.org/10.1117/12.2194804

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