Journal
TALANTA
Volume 103, Issue -, Pages 75-80Publisher
ELSEVIER
DOI: 10.1016/j.talanta.2012.10.008
Keywords
Electrochemical immunosensor; Graphene; Ferrocene derivatives; Human IgG
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Funding
- National Natural Science Foundation of China [20901003, 21073001, 21005001, 21075002]
- Natural Science Foundation of Anhui [KJ2009B013Z, KJ2012A139]
- Anhui Key Laboratory of Controllable Chemistry Reaction & Material Chemical Engineering [OFCC0905]
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In the present work, sensitive and stable sandwiched electrochemical immunosensing strategies with graphene (Gr)/gold nanoparticles (GNP) composite as the immobilization platform and ferrocene (Fc) derivatives as labels were proposed. Under the optimal choice and the proposed immunosensing strategy, with 1,1'-ferrocenedicarboxylic acid label, the human IgG could be detected specifically with a low detection limit of 0.4 ng/mL and a wide linear dynamic range from 1 to 300 ng/mL. Meanwhile, the electrochemical behavior of three different ferrocene derivatives labels was studied. (C) 2012 Elsevier B.V. All rights reserved.
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