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Reference type: Journal
Authors: Ren XH, Chen LG
Article Title: Quantum dots coated with molecularly imprinted polymer as fluorescence probe for detection of cyphenothrin.
Publication date: 2015
Journal: Biosensors and Bioelectronics
Volume: 64
Page numbers: 182-188.
DOI: 10.1016/j.bios.2014.08.086
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0956566314006861

Abstract: A newly designed molecularly imprinted polymer (MIP) material was fabricated and successfully utilized as recognition element to develop a quantum dots (QDs) based MIP-coated composite for selective recognition of the template cyphenothrin. The MIP-coated QDs were characterized by fluorescence spectrophotometer, Fourier transform infrared spectroscopy, transmission electron microscope, dynamic light scattering and X-ray powder diffraction. The fluorescence of the coated QDs is quenched on loading the MIP with cyphenothrin, and the effect is much stronger for the MIP than for the non-imprinted polymer, which indicates the MIP could as a recognition template composite. This method can detect down to 9.0 nmol L-1 of cyphenothrin in water, and a linear relationship has been obtained covering the concentration range of 0.1-80.0 μmol L-1. The method has been used in the determination of cyphenothrin in water samples and gave recoveries in the range from 88.5% to 97.1% with relative standard deviations in the range of 3.1-6.2%. The present study provides a new and general strategy to fabricate inorganic-organic MIP-coated QDs with highly selective recognition ability in aqueous media and is desirable for chemical probe application
Template and target information: cyphenothrin
Author keywords: molecular imprinting, Quantum dots, fluorescence quenching, Cyphenothrin


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