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. 2022 Apr 2;22(7):2754. doi: 10.3390/s22072754

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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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FT-IR spectra during step-by-step fabrication process of the aptasensor. Spectra of (a) Ag electrode, (b) 11MUA-Ag electrode, (c) EDC/NHS-11MUA-Ag electrode, (d) Aptamer-EDC/NHS-11MUA-Ag electrode, (e) BSA- Aptamer-EDC/NHS-11MUA-Ag electrode, and (f) Sensor after electrochemical measurements.