Silver Nanoparticle-Based Chemiluminescent Sensor Array for Pesticide Discrimination
Silver Nanoparticle-Based Chemiluminescent Sensor Array for Pesticide Discrimination
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DOI：
10.1021/acs.jafc.5b00671
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发表时间：
2015-03-25
影响因子：
6.1
通讯作者：
Yu, Haili
中科院分区：
文献类型：
--
作者：
He, Yi;Xu, Bo;Yu, Haili
在这项工作中，我们开发了一种简单，轻便，高灵敏度的纳米颗粒为基础的荧光（CL）传感器阵列的有机磷和氨基甲酸酯农药的歧视。该CL传感器阵列基于同时利用鲁米诺功能化的银纳米颗粒（Lum-AgNP）和H2 O2 CL系统的三通道特性，该系统包含CL强度、CL发射出现的时间和达到CL峰值的时间，这些都能够通过单个实验来测量。与农药相互作用后，三通道特性可以同时改变，产生不同的CL响应模式作为“指纹”与每个特定的农药，这是进行主成分分析（PCA），以生成聚类图。使用这种传感器阵列，五个有机磷和氨基甲酸酯农药，包括乐果，敌百虫，西维因，毒死蜱，和克百威，已被很好地区分在24 μ g/mL的浓度。共成功鉴定了20种未知农药样品，准确率达95%。本研究的简单策略有望促进基于功能化纳米材料的传感器阵列的发展。
In this work, we developed a simple, facile, and highly sensitive nanoparticle-based chemiluminescent (CL) sensor array for the discrimination of organophosphate and carbamate pesticides. This CL sensor array is based on simultaneous utilization of the triple-channel properties of the luminol-functionalized silver nanoparticle (Lum-AgNP) and H2O2 CL system containing CL intensity, the time for CL emissions to appear, and the time to reach the CL peak value, which are able to be measured via a single experiment. The triple-channel properties can be simultaneously altered after interaction with pesticides, producing distinct CL response patterns as "fingerprints" related to each specific pesticide, which was subjected to principal component analysis (PCA) to generate a clustering map. Using this sensor array, five organophosphate and carbamate pesticides, including dimethoate, dipterex, carbaryl, chlorpyrifos, and carbofuran, have been well-distinguished at a concentration of 24 mu g/mL. A total of 20 unknown pesticide samples have been successfully identified with an accuracy of 95%. The simple strategy of this study is expected to promote the development of functionalized nanomaterial-based sensor arrays.