期刊
COLLOIDS AND SURFACES B-BIOINTERFACES
卷 116, 期 -, 页码 714-719出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfb.2013.11.015
关键词
Interleukin-6; Electrochemical immunosensor; Graphene; Polydopamine
资金
- National Natural Science Foundation of China [21005001, 21073001]
- Anhui Provincial Natural Science Foundation [1208085QB28]
- Natural Science Foundation of Anhui [KJ2012A139]
- Anhui Key Laboratory of Controllable Chemistry Reaction & Material Chemical Engineering [OFCC0905]
An Interleukin-6 (IL-6) electrochemical immunosensor was fabricated based on the Au nanoparticles (AuNP)-graphene-silica sol-gel as immobilization biointerface and AuNP-polydopamine (PDA)@carbon nanotubes (CNT) as the label of HRP-bound antibodies. The AuNP-graphene-silica sot-gel film was prepared in situ and modified on the ITO electrode, providing a stable network for the immobilization of antibody and exhibiting a dynamic working range of 1-40 pg/mL with a low detection limit of 0.3 pg/mL IL-6 (at 3 s). The results of serum samples with the sensor received an acceptable agreement with the ELISA method. Importantly, this method provided a promising ultrasensitive assay strategy for clinical applications. (C) 2013 Elsevier B.V. All rights reserved.
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