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. 2023 Nov 10;11:1251360. doi: 10.3389/fchem.2023.1251360

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Copyright © 2023 Cancelliere, Cosio, Campione, Corvino, D’Amico, Micheli, Signori and Contini.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Electrochemical characterization of electrode interfaces during the multistep biosensor build-up. (A) Cyclic voltammograms and (B) Nyquist’s Plot recorded in 0.010 M [Fe(CN)₆]^4−/3− in 0.05 M PBS (IL-6 50 pg/mL). Curves of one representative immunosensor of at least 3 analysed SPEs are presented. Randles model for the equivalent circuit (solution resistance (Rs), charge transfer resistance (Rct), the capacitance of double layer (CPE), and Warburg impedance (W)) is reported as inset in panel (B) (Barsoukov, 2018).