Design of fluorescent self-assembled multilayers and interfacial sensing for organophosphorus pesticides

被引：27

作者：

Sun, Xiangying ^{[1
]}

Xia, Kaihao ^{[1
]}

Liu, Bin ^{[1
]}

机构：

[1] Huaqiao Univ, Coll Mat Sci & Engn, Key Lab Funct Mat Fujian Higher Educ, Quanzhou 362021, Peoples R China

来源：

TALANTA | 2008年 / 76卷 / 04期

基金：

中国国家自然科学基金;

关键词：

fluorescent sensor; self-assembled multilayers; organophosphorus pesticides; gold nanoparticles;

D O I：

10.1016/j.talanta.2008.04.020

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

This paper details the fabrication of indole (ID) self-assembled multilayers (SAMs) and fluorescence interfacial sensing for organophosphorus (OP) pesticides. Quartz/APES/AuNP/L-CYS/ID film was constructed on L-cysteine modified Quartz/APES/AuNP surface via electrostatic attraction between ID and L-cysteine. Cyclic voltammetry indicates that ID is immobilized successfully on the gold surface. Fluorescence of the Quartz/APES/AuNP/L-CYS/ID film shows sensitive response toward OPs. The fluorescent sensing conditions of the SAMs are optimized that allow linear fluorescence response for methylparathion and monocrotophos over 5.97 x 10(-7) to 3.51 x 10(-6) g L-1 and 3.98 x 10(-6) to 3.47 x 10(-5) g L-1, with detection limit of 6.1 x 10(-1) gL(-1) and 3.28 x 10(-6) gL(-1), respectively. Compared to bulk phase detection, interfacial fluorescence sensing based on the SAMs technology shows higher sensitivity by at least 2 order of magnitude. (C) 2008 Published by Elsevier B.V.

引用

页码：747 / 751

页数：5

共 17 条

[1]

Compton J.A., 1988, MILITARY CHEM BIOL A, P135

[2] Increased paraoxon detection with solvents using acetylcholinesterase inactivation measured with a choline oxidase biosensor [J].