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A polydopamine-based molecularly imprinted polymer on nanoparticles of type SiO 2@rGO@Ag for the detection of λ-cyhalothrin via SERS

A polydopamine-based molecularly imprinted polymer on nanoparticles of type SiO 2@rGO@Ag for the detection of λ-cyhalothrin via SERS

Hongji Li, Xiaonan Wang, Zirun Wang, Yan Wang, Jiangdong Dai, Lin Gao, Maobin Wei, Yongsheng Yan, Chunxiang Li

Mikrochim Acta. 2018 Feb 22;185(3):193.

PMID: 29594666

Abstract:

A new method is described for the determination of the pesticide λ-cyhalothrin (LC). It combines SERS detection with molecular imprinting and largely improves selectivity. A multilayer surface imprinted nanocomposite was synthesized in two steps on a nanostructure of type SiO2@rGO@Ag acting as a substrates. Firstly, the surface of the SiO2@rGO@Ag composite was modified with self-polymerized dopamine. Secondly, surface-initiated polymerization was carried out to prepare a molecularly imprinted polymer (MIP) using LC as the template. The use of this SiO2@rGO@Ag-MIP allows for excellent SERS based detection and has high selectivity for LC. The Raman intensity and LC concentration present perfect linear relationship between 10-5 to 10-9 mol L-1 and the detection limit is 3.8×10-10 mol L-1. All the procedures are conducted in aqueous or ethanol solution. Graphical abstract Schematic of a new method for determination of the pesticide λ-cyhalothrin. It combines SERS detection with molecular imprinting and largely improves selectivity. A multilayer surface imprinted nanocomposite was synthesized in two steps on a nanostructure of type SiO2@rGO@Ag acting as a substrates.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP68085858	Cyhalothrin solution		68085-85-8	Price

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