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. 2018 Jul 17;9:2786. doi: 10.1038/s41467-018-05238-w

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© The Author(s) 2018

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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 5 — Self-healing performance. a Photographs showing NIR laser-induced healing process of the separated hydrogels. The healed sample presented high stretchability. b Temperature changes of AATN hydrogel with 60 s of NIR laser irradiation. Scale bars, 1 cm. c Schematic illustrations of healing mechanism of the AATN hydrogel through the dynamic Ag–S interaction induced surface reconstruction under the laser. d Tensile stress–strain curves of the original and healed AATN hydrogels. The inset showing the healed AATN hydrogel lightening up the lamp under stretched deformation. e Electrical resistance change (ΔR) of the healed AATN hydrogel during bending-releasing cycles with the bending radius of 1 mm. The inset showing ΔR values in 1000 bending cycles. f ΔR values of the healed AATN hydrogel during ten stretching-releasing cycles with the fixed strains of 100, 300, and 500%. The inset showing ΔR values of the healed hydrogel during 1st, 10th, and 100th cycles under continuous stretching