4.6 Article

Self-Assembled MoS2/ssDNA Nanostructures for the Capacitive Aptasensing of Acetamiprid Insecticide

期刊

APPLIED SCIENCES-BASEL
卷 11, 期 4, 页码 -

出版社

MDPI
DOI: 10.3390/app11041382

关键词

aptasensor; MoS2; pesticide; neonicotinoid; capacitance

资金

  1. MEAE
  2. MESRI PHC grand [39382RE]

向作者/读者索取更多资源

This study presents a biosensor platform based on DNA aptamers for detecting the agricultural pesticide acetamiprid, with stable capacitance performance and high selectivity. By combining DNA aptamers with MoS2 nanosheets, the detection of acetamiprid and ion diffusion are facilitated.
Featured Application Authors are encouraged to provide a concise description of the specific application or a potential application of the work. This section is not mandatory. The aim of this work is to detect acetamiprid using electrochemical capacitance spectroscopy, which is widely used as a pesticide in agriculture and is harmful to humans. We have designed aptasensing platform based on the adsorption of a DNA aptamer on lipoic acid-modified MoS2 nano-sheets. The biosensor takes advantage of the high affinity of single-stranded DNA sequences to MoS2 nano-sheets. The stability of DNA on MoS2 nano-sheets is assured by covalent attachment to lipoic acid that forms self-assembled layer on MoS2 surface. The biosensor exhibits excellent capacitance performances owing to its large effective surface area making it interesting material for capacitive transduction system. The impedance-derived capacitance varies with the increasing concentrations of acetamiprid that can be attributed to the aptamer desorption from the MoS2 nanosheets facilitating ion diffusion into MoS2 interlayers. The developed device showed high analytical performances for acetamiprid detection on electrochemical impedance spectroscopy EIS- derived capacitance variation and high selectivity toward the target in presence of other pesticides. Real sample analysis of food stuff such as tomatoes is demonstrated which open the way to their use for monitoring of food contaminants by tailoring the aptamer.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据