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. 2021 Nov 10;14(22):6759. doi: 10.3390/ma14226759

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© 2021 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 of La-cholate/PAAm DN hydrogel network structure. (B) Fluorescent photographs of hydrogel under different strains. (C) Photographs show hydrogel adhered on a finger with different bending angles. (D) Change of resistance ratio of hydrogel with different bending angles. Photographs showing cyclic bending of wrist from 0 to 45° (E) and relative resistance ratio change (F). Photographs showing cyclic bending of knee from 0 to 90° (G) and relative resistance ratio change (H). (I,J) Recording breathing during inspiration and expiration. (K,L) Detection of vibration of human throat during speaking. Adapted with permission [110]; copyright 2019, Elsevier Ltd.