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

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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. 2 — a Illustration of P(VDF-TrFE)- and Ag NWs-coated elastic thread for linear strain sensors [113]. Copyright © 2016 Wiley–VCH. b Schematic diagram of depositing copper onto viscose fiber surface [6]. Copyright © 2021 Wiley–VCH. c In situ polymerization of polyester yarns by PEDOT [119]. Copyright © 2017 American Chemical Society. d Fabrication process of a spring-like strain sensor, with the structure of graphene-coated cover layer and PU core. e The illustration of Ag modified PU yarn for strain sensor with Ag-rich shell [123]. Copyright © 2018 American Chemical Society. f Fabrication of a strain sensor by modifying copper substrate with functional graphene and PVA [124]. Copyright © 2015 American Chemical Society. g A 1D coaxial-structured strain sensor consisted of PU core yarn, functional graphene and Ag NPs, and silicon encapsulated layer [125]. Copyright © 2018 Springer Nature