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Sensors 2018, 18(3), 828; https://doi.org/10.3390/s18030828

A Surface Plasmon Resonance-Based Optical Fiber Probe Fabricated with Electropolymerized Molecular Imprinting Film for Melamine Detection

1
Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
2
College of Engineering, Peking University, Beijing 100871, China
*
Author to whom correspondence should be addressed.
Received: 12 January 2018 / Revised: 20 February 2018 / Accepted: 5 March 2018 / Published: 9 March 2018
(This article belongs to the Special Issue Polymer-Based Sensors for Bioanalytes)
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Abstract

Molecularly imprinted polymer (MIP) films prepared by bulk polymerization suffer from numerous deficiencies, including poor mass transfer ability and difficulty in controlling reaction rate and film thickness, which usually result in poor repeatability. However, polymer film synthesized by electropolymerization methods benefit from high reproducibility, simplicity and rapidity of preparation. In the present study, an Au film served as the refractive index-sensitive metal film to couple with the light leaked out from optical fiber core and the electrode for electropolymerizing MIP film simultaneously. The manufactured probe exhibited satisfactory sensitivity and specificity. Furthermore, the surface morphology and functional groups of the synthesized MIP film were characterized by Atomic Force Microscopy (AFM) and Fourier transform infrared microspectroscopy (FTIR) for further insights into the adsorption and desorption processes. Given the low cost, label-free test, simple preparation process and fast response, this method has a potential application to monitor substances in complicated real samples for out-of-lab test in the future. View Full-Text
Keywords: surface plasmon resonance; electropolymerization; optical fiber probe; molecular imprinting; melamine surface plasmon resonance; electropolymerization; optical fiber probe; molecular imprinting; melamine
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Li, W.; Zheng, Y.; Zhang, T.; Wu, S.; Zhang, J.; Fang, J. A Surface Plasmon Resonance-Based Optical Fiber Probe Fabricated with Electropolymerized Molecular Imprinting Film for Melamine Detection. Sensors 2018, 18, 828.

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