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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) (a) Preparation of the HRP-anti-CEA-AuPt nanochains as label; (b) sandwich-type recognition; (c) transduction. (B) Corresponding LSV (I) and calibration (II) curves for CEA at different concentrations in PBS + 0.8 mM H₂O₂. Reprinted from [105], Copyright 2013, with permission from Elsevier. (C) Detection of CEA with AuNPs-Ab₂-GOx as label. (D) EIS (III) for CEA at different concentrations: (a) 5, (b) 10, (c) 20, (d) 30, (e) 40, (f) 50, (g) 60, (h) 70 and (i) 80 ng mL⁻¹ in 0.1 M KCl + 5.0 mM Fe(CN)₆^3−/4−; (IV) corresponding calibration curve. Reprinted from [106], Copyright 2016, with permission from Elsevier.