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. 2022 Feb 15;14:61. doi: 10.1007/s40820-022-00806-8

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© The Author(s) 2022

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 6 — a A yarn-like strain sensor fabricated by modifying PU yarn with AgNPs, and b the corresponding mechanism of the sensor [123]. Copyright © 2018 American Chemical Society. c The fabrication of a strain sensor by modifying PU fiber with ZnO NWs through the layer-by-layer coating, and d the crack formation on the sensor to show the sensing mechanism [114]. Copyright © 2016 Wiley-VCH. e The fabrication of a tunable wearable strain sensor with self-cleaning capability by layer-by-layer multifunctional coating, and f the crack formation of the coating layer to show the sensing mechanism [138]. Copyright © 2019 Elsevier. g The fabrication of nonwoven fabrics through blow spinning, and h the fabrication of a capacitive strain sensor by vertically stacking the PVdF-HFP dielectric fabric and the CNT/PVdF-HFP conductive fabric [179]. Copyright © 2019 Wiley-VCH