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

Applied Sciences

Zhenlin Chen¹  Kunlin Han¹  Ya-Nan Zhang¹ 

[1] College of Information Science and Engineering, Northeastern University, Shenyang 110819, China;

关键词: mercury ion;    fiber optic sensor;    surface plasmon resonance;    reflective sensor;   

DOI  :  10.3390/app9071480

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown