Recognition of dimethoate carried by bi-layer electrodeposition of silver nanoparticles and imprinted poly-o-phenylenediamine
Recognition of dimethoate carried by bi-layer electrodeposition of silver nanoparticles and imprinted poly-o-phenylenediamine
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纳米银和印迹聚邻苯二胺双层电沉积对乐果的识别
DOI：
10.1016/j.electacta.2008.04.027
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发表时间：
2008-09-20
影响因子：
6.6
通讯作者：
Zhang, Aidong
中科院分区：
文献类型：
--
作者：
Du, Dan;Chen, Shizhen;Zhang, Aidong
开发了基于电聚合方法的分子印迹聚合物薄膜，其具有敏感且选择性的乐果结合位点。通过在邻苯二胺和模板乐果溶液中进行电化学聚合，通过循环伏安扫描并进一步沉积银纳米粒子，将该薄膜浇铸在金电极上。电聚合过程中还同时记录了表面等离子体共振和循环伏安信号，控制聚合物薄膜的厚度为25 nm，压印薄膜对乐果表现出高选择性。通过测量电极上氧化还原探针K(3)Fe(CN)(6)的变化电流响应来观察印迹传感器和目标分子之间的识别。在最佳实验条件下,1.0~1000 ng·mL(-1)和1.0~50 μg·mL(-1)两个范围内的峰电流与氯甲果浓度成正比,检出限为0.5 ng·mL(-1)。由于高亲和力、选择性和稳定性，印迹传感器为有机磷酸酯化合物提供了一个简单的检测平台。 (C) 2008 Elsevier Ltd. 保留所有权利。
Thin film of a molecular imprinted polymer based on electropolymerization method with sensitive and selective binding sites for dimethoate was developed. This film was cast on gold electrode by electrochemical polymerization in solution of o-phenylenediamine and template dimethoate via cyclic voltammetry scans and further deposition of Ag nanoparticles. The surface plasmon resonance and cyclic voltammetric signals were also recorded simultaneously during the electropolymerization, controlling the thickness of the polymer film to be 25 nm, The imprinted film showed high selectivity towards to dimethoate. The recognition between the imprinted sensor and target molecule was observed by measuring the variation amperometric response of the oxidation-reduction probe, K(3)Fe(CN)(6), on electrode. Under the optimal experimental conditions, the peak currents were proportional to the concentrations of climethoate in two ranges, from 1.0 to 1000 ng mL(-1) and from 1.0 to 50 mu g mL(-1), with the detection limit of 0.5 ng mL(-1). Due to the high affinity, selectivity and stability the imprinted sensor provides a simple detection platform for orgamophosphate compounds. (C) 2008 Elsevier Ltd. All rights reserved.