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. 2024 Aug 16;29(16):3883. doi: 10.3390/molecules29163883

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© 2024 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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(a) Schematic diagram of elastomer−hydrogel integration as skin sensor and flexible electrode for detecting physiological health signal. (b) Application of hydrogel electrodes in sustained attention evaluation. (c) Interfacial contact impedance of different electrodes under real EEG signals. (d) Schematic diagram of the mechanism and evaluation of EEG acquisition system for wireless transmission, reprinted with permission [103,106], copyright © 2022 Elsevier B.V. and © 2023 John Wiley & Sons, respectively.