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. 2011 Sep;79(5):1704-9.
doi: 10.1016/j.saa.2011.05.040. Epub 2011 Jun 7.

Development of a novel deltamethrin sensor based on molecularly imprinted silica nanospheres embedded CdTe quantum dots

Shenguang Ge  1 , Juanjuan Lu, Lei Ge, Mei Yan, Jinghua Yu
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Development of a novel deltamethrin sensor based on molecularly imprinted silica nanospheres embedded CdTe quantum dots

Shenguang Ge et al. Spectrochim Acta A Mol Biomol Spectrosc. 2011 Sep.

Abstract

A novel procedure for the determination of deltmethrin (DM) is reported. The water-soluble CdTe quantum dots (QDs) and highly fluorescent silica molecularly imprinted nanospheres embedded CdTe QDs (CdTe-SiO2-MIPs) were prepared and characterized by fluorescence spectroscopy, UV-vis spectroscopy, TEM and IR. The fluorescence nanosensor based CdTe-SiO2-MIPs is developed. The possible quenching mechanism is discussed by DM. Under optimal conditions, the relative fluorescence intensity of CdTe-SiO2-MIPs decreased with increasing DM by a Stern-Volmer type equation in the concentration range of 0.5-35.0 μg mL(-1), the corresponding detection limit is 0.16 μg mL(-1). The developed sensor based on CdTe-SiO2-MIPs was applied to determine DM in fruit and vegetable samples.

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