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. 2021 May 6;6(9):2100020. doi: 10.1002/admt.202100020

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© 2021 Wiley‐VCH GmbH

This article is being made freely available through PubMed Central as part of the COVID-19 public health emergency response. It can be used for unrestricted research re-use and analysis in any form or by any means with acknowledgement of the original source, for the duration of the public health emergency.

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A) Fabrication of the Nafion/GOx/MC‐COOH sensor by dispersing GOx‐immobilized MC/COOH onto a carbon cloth electrode. Adapted with permission.^[ ⁴⁷ ^] Copyright 2020, MDPI. B) The fundamental principle of the 3D porous graphene aerogel@GOx system as a microfluidic biosensor. Adapted with permission.^[ ⁸⁷ ^] Copyright 2020, Royal Society of Chemistry. C) The PEC self‐powered sensor was constructed using a Fe₂O₃NR photoanode and platinum wire cathode. Adapted with permission.^[ ⁷⁷ ^] Copyright 2020, Elsevier. D) The mechanism of enzyme‐free electrochemical platform Pd‐PBTh/ITO. Adapted with permission.^[ ⁷⁹ ^] Copyright 2020, Elsevier.