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. 2020 Nov 3;11:5401. doi: 10.1038/s41467-020-19174-1

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© The Author(s) 2020

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. 3 — a 3D reconstruction of the all-natural bioinspired structural material derived from X-ray microtomography. b Fracture surface of an all-natural bioinspired structural material sample that shows long-range crack deflection. c Crack deflection, branching, bridging, and multiple cracking towards the end of the crack path. d Pulling out of TiO₂-mica microplatelets. e Details of the fracture surface showing TiO₂-mica microplatelet’s pulling out, delamination, CNF bridging, and stretching.