A new hydrogen peroxide biosensor based on synergy of Au@Au2S2O3 core-shell nanomaterials and multi-walled carbon nanotubes towards hemoglobin

被引：19

作者：

Li, Yuanjun ^{[1
]}

Huang, Fuying ^{[1
]}

Luo, Zhuanxi ^{[2
]}

Xu, Bin ^{[2
]}

Wang, Xinxing ^{[1
]}

Li, Feiming ^{[1
]}

Wang, Fei ^{[1
]}

Huang, Lixia ^{[1
]}

Li, Shunxing ^{[1
]}

Li, Yancai ^{[1
]}

机构：

[1] Zhangzhou Normal Univ, Dept Chem, Zhangzhou 363000, Peoples R China

[2] Chinese Acad Sci, Inst Urban Environm, Xiamen 361021, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2012年 / 74卷

基金：

中国国家自然科学基金;

关键词：

H2O2; biosensor; Au@Au2S2O3; Core@shell nanomaterials; Hemoglobin; Multi-walled carbon nanotubes; DIRECT ELECTRON-TRANSFER; BY-LAYER FILMS; DIRECT ELECTROCHEMISTRY; COMPOSITE FILM; GOLD NANORODS; OPTICAL-PROPERTIES; NANOPARTICLES; MYOGLOBIN; ELECTROCATALYSIS; FABRICATION;

D O I：

10.1016/j.electacta.2012.04.097

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A new H2O2 biosensor was constructed by immobilizing Hb in the Chit-MWNTs/Au@Au2S2O3 composite membrane. Owing to the superior performance of novel Au@Au2S2O3 core-shell nanomaterials and its synergy with multi-walled carbon nanotubes (MWNTs), the direct electron transfer of Hb in composite membrane was easily achieved. The Chit-MWNTs/Hb/Au@Au2S2O3/CCE displayed a pair of well-defined and reversible redox peaks in 0.1 M pH 7.0 PBS. The electrocatalytic reduction to H2O2 of Chit-MWNTs/Hb/Au@Au2S2O3/GCE was also studied. Its apparent Michaelis-Menten constant for H2O2 was 0.014 mM, showing a good affinity. The experimental results showed that the linear dependence of the biosensor was from 4.0 x 10(-5) to 7.2 x 10(-4) M, and the detection limit of the sensor was 3.2 x 10(-6) M (S/N = 3). Moreover, the biosensor showed a rapid response to H2O2, a good stability and reproducibility. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：280 / 286

页数：7

共 31 条

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