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. 2022 Aug 26;10:940795. doi: 10.3389/fchem.2022.940795

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Copyright © 2022 Chang, Huang, He and Xi.

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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CV (A) and EIS (B) curves obtained on different electrodes including GCE, CS-G/GCE, AuNPs/CS-G/GCE, Ab_BGP/AuNPs/CS-G/GCE, and BGP/Ab_BGP/AuNPs/CS-G/GCE. The electrolyte solution is Fe(CN)₆ ^3-/4- (2.5 mM) containing 0.1 M KCl. Inset in (A) includes the corresponding DPV curves. Insets in (B) are equivalent circuits of detection (left) and the enlarged view of the EIS curves at the high frequency region.