SPR and Molecular Imprinting-Based Fiber-Optic Melamine Sensor With High Sensitivity and Low Limit of Detection


We report a fiber-optic surface plasmon resonance (SPR) sensor for the detection of melamine using molecular imprinting and an extra layer of silicon in the probe. To realize the most sensitivity and minimum detection limit of the sensor, the thickness of the silicon layer has been optimized. The proposed sensor encompasses a high sensitivity of seventy nm/log M. The limit of detection of the sensor has been found to be four.three × ten−eleven M, that in comparison with the previously reported values for melamine detection has been found to be the smallest amount to the best of our information. Selectivity experiments with dissimilar analytes have also been performed and it's been found that the sensor is extremely selective. High sensitivity, low limit of detection, and high selectivity are due to a combined approach of SPR, molecular imprinting, and additional layer of silicon employed in the probe. The sensor has varied different blessings like low price, easy handling, capability of online monitoring, and remote sensing.

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