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Title: Chitosan/poly (acrylic acid) based fiber-optic surface plasmon resonance sensor for Cu2+ ions detection
Authors: Ding, Zhe-Wen
Ravikumar, Raghunandhan
Zhao, Chun-Liu
Chen, Li Han
Chan, Chi-Chiu
Keywords: Engineering::Chemical engineering
Issue Date: 2019
Source: Ding, Z., Ravikumar, R., Zhao, C., Chen, L. H. & Chan, C. (2019). Chitosan/poly (acrylic acid) based fiber-optic surface plasmon resonance sensor for Cu2+ ions detection. Journal of Lightwave Technology, 37(10), 2246-2252.
Journal: Journal of Lightwave Technology
Abstract: A novel fiber-optic surface plasmon resonance sensor for detection of Cu 2+ ions in an aquatic environment is proposed and experimentally demonstrated. The proposed sensor is fabricated by splicing no-core fiber between multimode fibers and then functionalizing the sensor surface with gold film and chitosan (CS)/poly(acrylic acid) (PAA) bilayers. The gold film is used to stimulate surface plasmon waves and make the sensor sensitive to changes in refractive index induced by Cu 2+ ions absorption on the CS/PAA bilayers. The proposed sensor has a linear relationship between the wavelength shifts and the concentrations of Cu 2+ ions from 0.2 to 50 μM and 50 to 500 μM, respectively. It is also observed that the sensor's performance is better at low concentrations, and its sensitivity decreases with the increasing concentration. Moreover, we find the proposed sensor can express the self-assembly process between CS and PAA clearly, which shows us a new and easy way to investigate the polyelectrolyte self-assembling.
ISSN: 0733-8724
DOI: 10.1109/JLT.2019.2901367
Rights: © 2019 IEEE. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:SCBE Journal Articles

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