Novel triadimenol detection assay based on. fluorescence resonance energy transfer between gold nanoparticles and cadmium telluride quantum dots

文献类型: 外文期刊

第一作者: Liu, Guangyang

作者: Liu, Guangyang;Huang, Xiaodong;Zheng, Shuning;Li, Lingyun;Xu, Donghui;Xu, Xiaomin;Zhang, Yanguo;Lin, Huan

作者机构:

关键词: Fluorescent assay;Triadimenol;Fluorescence resonance energy transfer;Gold nanoparticles;Cadmium telluride quantum dots;Agricultural irrigation water

期刊名称:DYES AND PIGMENTS ( 影响因子:4.889; 五年影响因子:4.016 )

ISSN: 0143-7208

年卷期: 2018 年 149 卷

页码:

收录情况: SCI

摘要: We developed a highly sensitive fluorescent assay based on fluorescence resonance energy transfer (FRET) between gold nanoparticles (AuNPs) and cadmium telluride (CdTe) quantum dots (QDs) for detection of triadimenol in tap water and agricultural irrigation water. The electrostatic interaction between the positively charged CdTe QDs and negatively charged AuNPs strongly quenched the fluorescence emission of CdTe QDs. In the presence of triadimenol, the strong electrostatic attraction between negatively charged AuNPs and positively charged triadimenol molecules rapidly induced the aggregation of AuNPs, blocking the FRET reaction and attenuating the quenched efficiency of CdTe QDs. The change of fluorescence intensity was linearly related to the concentration of triadimenol in the concentration range of 0.338-33.8 mu M. The detection limit (S/N = 3) of the sensor was as low as 0.182 mu M. The fluorescent sensor was successfully used to detect triadimenol in spiked water samples and gave good recoveries. (C) 2017 Elsevier Ltd. All rights reserved.

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