Carmichael’s Concise Review


When a fracture did appear, Gim et al. found that the


organic components resisted crack propagation both within and between platelets. Te overall macroscale architecture was sustained through multiple fractures that allowed further structural loading. Tey found that nacre absorbs roughly 1 to 3 times more mechanical energy than aragonite alone. S/TEM revealed that when heavily compressed, oppos-


ing nacre platelets interlocked across the mineral-organic interface to form temporary inorganic connections. Aſter releasing the load, the mineral connections at the deformed organic interface and the intraplatelet nanostructure per- fectly recovered their initial morphology without any sus- tained deformation. It is as if an organic “mortar” that holds the platelets together is pushed aside under pressure and springs back into place when force is removed. Te approach employed by Gim et al. enables investiga-


tion of a wide range of biominerals with desirable structural properties. Te better understanding of deformation and recovery in nacre demonstrated by Gim et al. may inspire new routes to synthesize complex structural materials.


References [1] Gim et al., Nat Comm 10 (2019) 4822. [2] Te author gratefully acknowledges Dr. Robert Hovden for reviewing this article.


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