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. 2017 Apr 7;17(4):794. doi: 10.3390/s17040794

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© 2017 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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(A) GC/Ph/AuNP competitive immunosensor for CEA detection; (B) CVs of the modified electrode in 10 mM [Fe(CN)₆]^4−/3− + 0.1 M KCl, for (a) a bare electrode; (b) NH₂-Ph-NH₂-modified electrode; (c) NH₂-Ph-NH₂ + AuNPs and (d) NH₂-Ph-NH₂ + AuNPs + Anti-CEA. Reprinted from [130]. Copyright 2012, with permission from Elsevier; (C) Ag/AuNPs coated on GR as CEA immunosensor; (D) CVs obtained in PBS form a Ag/AuNPs/GR electrode, showing the oxidation/reduction of the Ag⁰/Ag₂O couple for different concentrations of CEA. Reprinted from [139], Copyright 2015, with permission from Elsevier.