Alpha-1-fetoprotein antibody functionalized Au nanoparticles: Catalytic labels for the electrochemical detection of α-1-fetoprotein based on TiO2 nanoparticles synthesized with ionic liquid

被引：17

作者：

Tan, Lin ^{[1
]}

Chen, Yaqian ^{[1
]}

Yang, Hua ^{[1
]}

Shi, Ya ^{[1
]}

Si, Jianfei ^{[1
]}

Yang, Guangming ^{[1
]}

Wu, Zaisheng ^{[2
]}

Wang, Ping ^{[1
]}

Lu, Xuxiao ^{[1
]}

Bai, Huiping ^{[1
]}

Yang, Yunhui ^{[1
]}

机构：

[1] Yunnan Normal Univ, Coll Chem & Chem Engn, Kunming 650092, Yunnan, Peoples R China

[2] Hunan Univ, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2009年 / 142卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Ionic liquids; TiO2; nanoparticles; AFP; Au-labeled AFP (Ab); Immunosensor; CARBON-PASTE ELECTRODE; ALPHA-FETOPROTEIN; GOLD NANOPARTICLES; HYDROGEN-PEROXIDE; AMPEROMETRIC IMMUNOSENSOR; CARCINOEMBRYONIC ANTIGEN; IMMUNOASSAY; BIOSENSOR; FILM; NANOTUBES;

D O I：

10.1016/j.snb.2009.08.011

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A novel strategy for the preparation of amperometric immunosensor for rapid determination of alpha-1-fetoprotein (AFP) in human serum has been developed. TiO2 nanoparticles (NPs) were prepared by solvothermal reaction using TiCl4 as raw materials and the mixture of ionic liquids and doubly distilled water as solvent. alpha-1-fetoprotein antibody (AFP Ab) was mixed with TiO2 NPs/chitsotan (CHIT) solution and immobilized onto the surface of a glassy carbon electrode. AFP (Ab) functionalized Au NPs were used as catalytic labels for the amperometric detection of AFP by means of the electrocatalyzed reduction of Au NPs to H2O2. The electrochemical behavior of the immunosensor was studied. Other experimental conditions such as pH, immunoreactions temperature and time were also studied. The prepared immunosensor offers an excellent amperometric response for AFP ranging from 1.0 to 160.0 ng/mL with a detection limit of 0.1 ng/mL. The result shows that the immunosensor displays rapid response, high sensitivity, good reproducibility and favorable stability. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：316 / 320

页数：5

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