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. 2020 Aug 11;20(16):4484. doi: 10.3390/s20164484

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© 2020 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 (http://creativecommons.org/licenses/by/4.0/).

PMC Copyright notice

Sensor electrodes. (a) Nanocomposite electrode. Reproduced with permission [321] Copyright 2019, Elsevier. (b) Patterned electrode. Reproduced with permission [322] Copyright 2017, Elsevier. (c) Conducting polymer. Reproduced with permission [323] Copyright 2017, Wiley. (d) Conductive texture. Reproduced under an open access creative commons CC BY 4.0 license [324] Copyright 2017, MDPI. (e) Metallic electrode. Reproduced with permission [325] Copyright 2016, American Chemical Society.