Development and application of a novel fluorescent nanosensor based on FeSe quantum dots embedded silica molecularly imprinted polymer for the rapid optosensing of cyfluthrin

• Published in: Biosensors & bioelectronics 2018-01, Vol.99, p.268-273
• Main Authors: Li, Xunjia, Jiao, Hai-Feng, Shi, Xi-Zhi, Sun, Aili, Wang, Xiujuan, Chai, Jiye, Li, De-Xiang, Chen, Jiong
• Format: Article
• Language: English
• Subjects: Animals; Biosensing Techniques; Cyfluthrin; Determination; FeSe quantum dot; Fishes; Limit of Detection; Microscopy, Electron, Transmission; Molecular Imprinting; Molecularly imprinted; Nanoparticles - chemistry; Nitriles - chemistry; Nitriles - isolation & purification; Pyrethrins - chemistry; Pyrethrins - isolation & purification; Quantum Dots - chemistry; Silicon Dioxide - chemistry
• ISSN: 0956-5663; 1873-4235
• DOI: 10.1016/j.bios.2017.07.071

A novel molecularly imprinted silica layer appended to FeSe quantum dots (MIP-FeSe-QDs) was fabricated and utilized as a recognition element to develop a selective and sensitive fluorescent nanosensor for cyfluthrin (CYF) determination. The MIP-FeSe-QDs were characterized by fluorescence spectrometry, scanning electron microscopy, transmission electron microscopy, and Fourier transform infrared spectroscopy. Excellent selectivity and high sensitivity of MIP-FeSe-QDs to CYF molecules were observed based on the fluorescence quenching of FeSe-QDs. Under optimal conditions, a good linear relationship was found between fluorescence quenching effect and increased CYF concentration within 0.010–0.20mg/L, with a correlation coefficient of 0.9911. The practicality of the developed sensor method for CYF detection in fish and sediment samples was further validated. Good recoveries ranging from 88.0% to 113.9% with