| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7143474 | Sensors and Actuators B: Chemical | 2016 | 8 Pages |
Abstract
An interferometric sensor with a no-core fiber (NCF) spliced between single mode fibers (SMF) and functionalized with chitosan (CS)/poly acrylic acid (PAA) self-assembled polyelectrolyte layers for the detection of heavy metal ion Nickel (II) (Ni2+), is proposed and experimentally demonstrated. The sensing scheme is based on interference of core and cladding modes to detect changes in refractive index induced by Ni2+ adsorption on the functionalized sensor. Wavelength shifts were measured real-time for the continuous monitoring of adsorption of Ni2+ at different concentrations. The proposed sensor exhibits a linear response in the concentration range upto 500 μM, with a Ni2+ detection sensitivity of 0.05537 nm/μM and concentration detection limit of 0.1671 μM.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
R. Raghunandhan, L.H. Chen, H.Y. Long, L.L. Leam, P.L. So, X. Ning, C.C. Chan,