分子印迹聚合物
纳米传感器
量子点
荧光
检出限
量子产额
碲化镉光电
分子印迹
化学
材料科学
分析化学(期刊)
核化学
纳米技术
选择性
色谱法
有机化学
物理
催化作用
量子力学
作者
Mohammad Amjadi,Roghayeh Jalili,Jamshid L. Manzoori
出处
期刊:Luminescence
[Wiley]
日期:2015-08-19
卷期号:31 (3): 633-639
被引量:36
摘要
A novel fluorescent nanosensor using molecularly imprinted silica nanospheres embedded CdTe quantum dots (CdTe@SiO2@MIP) was developed for detection and quantification of chloramphenicol (CAP). The imprinted sensor was prepared by synthesis of molecularly imprinting polymer (MIP) on the hydrophilic CdTe quantum dots via reverse microemulsion method using small amounts of solvents. The resulting CdTe@SiO2@MIP nanoparticles were characterized by fluorescence, UV–vis absorption and FT-IR spectroscopy and transmission electron microscopy. They preserved 48% of fluorescence quantum yield of the parent quantum dots. CAP remarkably quenched the fluorescence of prepared CdTe@SiO2@MIP, probably via electron transfer mechanism. Under the optimal conditions, the relative fluorescence intensity of CdTe@SiO2@MIP decreased with increasing CAP by a Stern–Volmer type equation in the concentration range of 40–500 µg L–1. The corresponding detection limit was 5.0 µg L–1. The intra-day and inter-day values for the precision of the proposed method were all <4%. The developed sensor had a good selectivity and was applied to determine CAP in spiked human and bovine serum and milk samples with satisfactory results. Copyright © 2015 John Wiley & Sons, Ltd.
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