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An example of using soluble AgNPs-based nanocomposite as a label for CEA detection. (a) CVs of RGO/Co3O4-Ag, RGO@PDA-Ag, and RGO/Co3O4@PDA-Ag in 0.1 M PBS (pH = 7.0) containing 0.1 M KCl. (b) DPV of RGO/Co3O4@PDA-Ag in 0.1 M pH 7.0 PBS containing 0.1 M KCl with (red line) or without (black line) 3 mM H2O2. Redrawn from [49].© Elsevier publishing.
