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

作者：Li, Xunjia; Jiao, Hai-Feng; Shi, Xi-Zhi^*; Sun, Aili; Wang, Xiujuan; Chai, Jiye; Li, De-Xiang; Chen, Jiong

来源：Biosensors and Bioelectronics, 2018, 99: 268-273.

DOI：10.1016/j.bios.2017.07.071

• FeSe quantum dot
• Molecularly imprinted
• Cyfluthrin
• Determination

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 0.010-0.20 mg/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 < 6.8% relative standard deviations were obtained. The detection limits of CYF in sediment and fish samples were 1.3 and 1.9 mu g/kg, respectively. This study established a novel, rapid fluorescent nanosensor detection method based on MIP-QDs for successfully analyzing CYF in fish and sediment samples.

• 出版日期2018-1-15
• 单位宁波大学