Surface molecular imprinting on hybrid SiO2-coated CdTe nanocrystals for selective optosensing of bisphenol A and its optimal design
作者： Chunxiao Qiu , Youhong Xing , Wenming Yang , Zhiping Zhou , Yingchun Wang
DOI: 10.1016/J.APSUSC.2015.03.150
关键词:
摘要: Abstract Twenty molecular dynamics (MD) simulations of imprinting prepolymerization systems had been performed to optimize the shell fluorescent sensor. The results revealed that system with a Bisphenol A (BPA): 3-aminopropyltriethoxysilane (APTES): tetraethylorthosilicate (TEOS) mole ratio 10:15:60 most stable template (T)-functional monomer (FM) cluster. Correspondingly, five kinds imprinted and non-imprinted polymers were synthesized assess reliability validity simulation results. Hybrid SiO2-coated CdTe NCs (HS-QD) by simple reflux procedure including sol-gel reaction resulted in formation hybrid SiO2 layer CdS-like clusters on core. Based optimal component system, MIP shells anchored surface HS-QD build linear relationship between relative fluorescence intensity concentration BPA obtained covering range 0.05–10 μmol L−1 limit detection 6 nmol L−1. feasibility sensor was successfully evaluated through analysis river water milk. recoveries are above 96.31%, standard deviation (RSD) ranged from 1.55% 2.78%.
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