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. 2017 Aug 18;8:287. doi: 10.1038/s41467-017-00392-z

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© The Author(s) 2017

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. 2 — Mechanical properties of as-fabricated bulk artificial nacre. a Flexural stress–strain curves of the artificial nacre fabricated with different synthetic conditions, natural Cristaria plicata (CP) nacre, pure SA bulk, and disordered composite. b Comparison of flexural strength and stiffness of the artificial nacre fabricated with different synthetic conditions with natural CP nacre, pure SA bulk, and disordered composite. c Fracture toughness for crack initiation (K _Ic) and stable crack propagation (K _Jc) of the bulk artificial nacre compared to natural CP nacre, pure SA bulk, and disordered composite. d Crack-resistance curves (R-curves) showing the resistance to fracture in terms of the stress intensity, K _Jc, as a function of crack extension, Δa, for the bulk artificial nacre, natural CP nacre, pure SA bulk, and disordered composite. All the error bars represent the s.d. of at least six replicate measurements