Sensing H2O2 with layer-by-layer assembled Fe3O4-PDDA nanocomposite film

被引：109
作者：
Zhang, Lihua [1 ]
Zhai, Yueming [1 ]
Gao, Na [1 ]
Wen, Dan [1 ]
Dong, Shaojun [1 ]
机构：
[1] Chinese Acad Sci, Changchun Inst Appl Chem, Grad Sch, State Key Lab Electroanalyt Chem, Changchun 130022, Peoples R China
来源：
ELECTROCHEMISTRY COMMUNICATIONS | 2008年 / 10卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Fe3O4; nanoparticles; H2O2; Layer-by-layer assembly;
D O I：
10.1016/j.elecom.2008.05.022
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
It was found that Fe3O4 nanoparticles (Fe3O4 NPs) possess intrinsic enzyme mimetic activity similar to that found in natural peroxidase. Here, we applied Fe3O4 NPs to the construction of efficient electrochemical sensor to detect the concentration of hydrogen peroxide. The sensor was fabricated with layer-by-layer assembly of Fe3O4 NPs and poly(diallyldimethylammonium chloride) (PDDA) through the electrostatic interaction, and the multilayer film was characterized with UV-vis absorption spectra, atomic force microscopy, and cyclic voltammetry. Moreover, the sensor showed prominent electrocatalytic activity toward the reduction of H2O2, and the interferences of ascorbic acid (AA) and uric acid (UA) were completely avoided. Unlike the inherent instability of enzyme, Fe3O4 NPs-based sensor demonstrated outstanding stability. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：1524 / 1526
页数：3
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