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Characterization of the electrochemical measurements by self-designed magnetic electrochemical sensor: (A) CV; (B) EIS. The labeling a through e denote: a, bare GCP; b, DepAu-modified GCP; c, DepAu-modified GCP blocked with HT; d, fabricated GCP after adsorption with MB@SA; e, fabricated GCP with capture antibodies on the surface of MB@SA. Insert of Figure 2B is the EIS characterization of bare GCP (a) and DepAu modified GCP (b) with high amplification.
