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Surface-imprinted core-shell nanoparticles for sorbent assays

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Surface-imprinted core-shell nanoparticles for sorbent assays.htm (392bytes)
Date
2007-06
Author
Lu, Chun-Hua
Zhou, Wen-Hui
Han, Bing
Yang, Huang-Hao
Chen, Xi
陈曦
Wang, Xiao-Ru
王小如
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  • 化学化工-已发表论文 [14469]
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Abstract
In this paper, we present a general protocol for the making of surface-imprinted core-shell nanoparticles via surface reversible addition-fragmentation chain-transfer (RAFT) polymerization using RAFT agent functionalized model silica nanoparticles as the chain-transfer agent. In this protocol, trichloro(4-chloromethylphenyl)silane was immobilized on the surface of SiO2 nanoparticles, forming chloromethylphenyl functionalized silica (silica-Cl). RAFT agent functionalized silica was subsequently produced by substitute reaction of silica-Cl with PhC(S)SMgBr. The grafting copolymerization of 4-vinylpyridine and ethylene glycol dimethacrylate using surface RAFT polymerization and in the presence of 2,4-dichlorophenoxyacetic acid as the template led to the formation of surface-imprinted core-shell nanoparticles. The resulting surface-imprinted core-shell nanoparticles bind the original template 2,4-D with an appreciable selectivity over structurally related compounds. The potential use of the surface-imprinted core-shell nanoparticles as the recognition element in the competitive fluorescent binding assay for 2,4-D was also demonstrated.
Citation
Anal. Chem., 2007, 79 (14): 5457–5461
URI
http://dx.doi.org/doi:10.1021/ac070282m
https://dspace.xmu.edu.cn/handle/2288/9385

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