Reflective Fiber Surface Plasmon Resonance Sensor for High-Sensitive Mercury Ion Detection

This paper proposes a reflective fiber mercury ion sensor based on the surface plasmon resonance (SPR) principle and chitosan (CS)/polyacrylic acid (PAA) multilayer sensitive film. By optimizing the coating parameters of the gold film, the refractive index (RI) sensitivity of the reflective SPR sens...

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Bibliographic Details
Published inApplied sciences Vol. 9; no. 7; p. 1480
Main Authors Chen, Zhenlin, Han, Kunlin, Zhang, Ya-Nan
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.04.2019
Subjects
Change detection
Coating
Coatings
fiber optic sensor
Fiber optics
Gold
Light
Mercury
mercury ion
Mercury surface
Metals
Nanoparticles
Optical communication
reflective sensor
Refractivity
Resonance
Sensors
Simulation
Surface plasmon resonance
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Summary:This paper proposes a reflective fiber mercury ion sensor based on the surface plasmon resonance (SPR) principle and chitosan (CS)/polyacrylic acid (PAA) multilayer sensitive film. By optimizing the coating parameters of the gold film, the refractive index (RI) sensitivity of the reflective SPR sensor is demonstrated to be 2110.33 nm/RIU. Then, a multi-layer CS/PAA film is fixed on the surface of the gold film as a mercury ion sensitive film to form a reflective SPR fiber mercury ion sensor. Experimental results demonstrate that the sensor can be used to detect different concentrations of mercury ions with a high sensitivity of 0.5586 nm/μM and good specificity and repeatability. Therefore, the reflective SPR fiber mercury ion sensor shows great promise for future applications of environmental monitoring and drinking water safety.
ISSN:2076-3417
2076-3417
DOI:10.3390/app9071480