Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7144052 | Sensors and Actuators B: Chemical | 2016 | 10 Pages |
Abstract
In this paper, a novel turn-on sensor was constructed for quantification and imaging of acetamiprid. Acetamiprid aptamer-modified ZnS:Mn probe (ZnS:Mn-Aptamer) was obtained by conjugating ZnS:Mn QDs with acetamiprid binding aptamer. The fluorescence of the probe was turn off by multi-walled carbon nanotubes (MWCNTs) based on fluorescence resonance energy transfer (FRET) between ZnS:Mn-Aptamer and MWCNTs. After acetamiprid was introduced, the fluorescence was turn on because ZnS:Mn-Aptamer specifically binded with acetamiprid. Based on the above-mentioned principle, the quantitative detection and imaging of acetamiprid in real samples were achieved. The linear equation could be described as F/F0Â =Â 1.101Â +Â 0.0312CA (CA represented the concentration of acetamiprid, nM) in a linear range of 0-150Â nM with a detection limit of 0.7Â nM. The results suggested this method had remarkable sensitivity, selectivity, and was very simple without complex operation. Meanwhile, this novel turn-on sensor has the potential of in situ visual determination for pesticide residues in complex system.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Bixia Lin, Ying Yu, Ruoying Li, Yujuan Cao, Manli Guo,