Fiber-based Surface Plasmon Resonance Sensor for Lead Ion Detection in Aqueous Solution

Abstract

Maghemite/reduced graphene oxide nanocomposite has been successfully deposited onto the surface of a gold-coated Dshaped optical fiber. The synergetic combination of gold, graphene, and iron oxide nanoparticles has shown enhancement of the resonance field and sensitivity of the fiberbased plasmonic sensor. Im particular, the sensor exhibited its capability to detect lead ions (Pb2+) in aqueous solution via monitoring the spectral response of the sensor probe to different concentrations of Pb2+. A sensor sensitivity of 1.2 nm per μg/L was attained at the lowest detected Pb2+ concentration, which is 0.001 ppm (limit of detection). This robust, compact, and highly sensitive fiber-based plasmonic sensor will be of a great interest for an in situ and real-time water safety environmental monitoring.

Fiber-optic lead ion sensor based on MXene film integrated michelson interference structure

“…The response range and response time are the key factors to determine the quality of a sensor. The previously reported optical fiber sensors mainly have a slow response speed and a narrow detection range [21,22,[43][44][45][46]. In this work, the MXene modified optical fiber sensor can detect lead ion concentration in the range of 0-100 μM, and its response speed is 2 min, which is superior to the results of the previous literatures…”

“…Nevertheless, the quantum dot materials are expensive and difficult to be synthesized. A lead ion sensor with γ−Fe 2 O 3 /rGO-coated optical fiber was fabricated by F. Suhailin et al, and the detection of lead ion concentration in the range of 1-150000 ppb was realized, but the response time is slow (500 s) [21]. B. S. Boruah et al used metal surface plasmon resonance and the composite of chitosan and glutathione to detect the concentration of lead ions.…”

Hydrogel-integrated optical fiber sensors and their applications: a comprehensive review

“…109 The general applications are pH sensing, [117][118][119] temperature sensing, 118,120,121 RI sensing, 121,122 and ion concentration sensing. 123,124 The optical fiber integrated SPR sensors demonstrate advantages in the detection process along with high spatial resolution, on-line distributed measurement, remote sensing, and low cost. 125 Hydrogel coating can further improve the SPR effect on optical fiber-based sensors.…”

Optical fiber sensors for water and air quality monitoring: a review

“…A two-channel optical fiber SPR platform based on the modification with heavy metal ion-imprinted nanoparticles was presented by Shrivastav and Gupta. 80 81 The sensor's configuration involved sputtering an Au film on the D-type fiber surface as a plasma excitation layer, followed by modification with a layer of γFe 2 O 3 ∕reduced graphene oxide (rGO) nanocomposites to serve as the sensing layer. The sensor exhibited a Pb 2þ sensitivity of 1.2 nm∕μg∕L, and the lower limit of detection was 0.001 ppm.…”