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. 2022 Apr 19;13:2121. doi: 10.1038/s41467-022-29802-7

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© The Author(s) 2022

Open Access This 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. 4 — a Photograph of the magnetic hair embedded e-skin system. It consists of an encapsulated IMOS array for signal reception and a magnetic hair embedded skin layer for the transducing of mechanic stimulus Scale bar, 5 mm. b Photographs of the integration process. 1, The IMOS device is encapsulated by epoxy. Scale bar, 4 mm. 2, The small magnet is adhered to a hair and embedded in epoxy. Scale bar, 2 mm. 3, A spacer PDMS film with cavities is fabricated. Scale bar, 5 mm. 4, Ultra-flexible Ecoflex film is casted. Scale bar, 2 mm. 5, Magnetic hair, PDMS spacer and Ecoflex skin are assembled. Scale bar, 15 mm. 6, Bottom view of the skin layer showing that the magnets are hold within the cavities of the PDMS spacer. Scale bar, 5 mm. c Single pixel response over time by bending the hair in different directions. The initial state (I) and the different bending directions (II–V) of the magnetic hair are illustrated schematically. d Response of the pixel array to the mechanical stimuli of multiple hairs. Source data are provided as a Source Data file.