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. 2022 Jun 28;12(7):468. doi: 10.3390/bios12070468

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© 2022 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 (https://creativecommons.org/licenses/by/4.0/).

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DPV diagrams of the electrodes modified with nanocomposite (A) MWCNTs-AuNPs, (B) MWCNTs-AuNPs/CS-AuNPs, and (C) MWCNTs-AuNPs/CS-AuNPs/rGO-AuNPs in a solution containing K₃Fe (CN)₆ and K₄Fe (CN)₆ 3.0 mM and 0.1 M KCl. (a) relating to the unmodified electrodes, (b) modified electrodes with the synthesized nanocomposites, (c) modified electrodes after aptamer addition and (d) modified electrodes with aptamer after 30 min interaction with OTC 10.0 nM.