Mechanical adaptation of brachiopod shells via hydration-induced structural changes.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
10 09 2021
10 09 2021
Historique:
received:
12
03
2021
accepted:
16
08
2021
entrez:
11
9
2021
pubmed:
12
9
2021
medline:
15
10
2021
Statut:
epublish
Résumé
The function-optimized properties of biominerals arise from the hierarchical organization of primary building blocks. Alteration of properties in response to environmental stresses generally involves time-intensive processes of resorption and reprecipitation of mineral in the underlying organic scaffold. Here, we report that the load-bearing shells of the brachiopod Discinisca tenuis are an exception to this process. These shells can dynamically modulate their mechanical properties in response to a change in environment, switching from hard and stiff when dry to malleable when hydrated within minutes. Using ptychographic X-ray tomography, electron microscopy and spectroscopy, we describe their hierarchical structure and composition as a function of hydration to understand the structural motifs that generate this adaptability. Key is a complementary set of structural modifications, starting with the swelling of an organic matrix on the micron level via nanocrystal reorganization and ending in an intercalation process on the molecular level in response to hydration.
Identifiants
pubmed: 34508091
doi: 10.1038/s41467-021-25613-4
pii: 10.1038/s41467-021-25613-4
pmc: PMC8433230
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.
Langues
eng
Sous-ensembles de citation
IM
Pagination
5383Informations de copyright
© 2021. The Author(s).
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