A Molecular-Scale Understanding of Misorientation Toughening in Corals and Seashells.
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| Název: | A Molecular-Scale Understanding of Misorientation Toughening in Corals and Seashells. |
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| Autoři: | Lew, Andrew J, Stifler, Cayla A, Tits, Alexandra, Schmidt, Connor A, Scholl, Andreas, Cantamessa, Astrid, Müller, Laura, Delaunois, Yann, Compère, Philippe, Ruffoni, Davide, Buehler, Markus J, Gilbert, Pupa U P A |
| Zdroj: | Advanced Materials, 35 (28), e2300373 (2023-07) |
| Informace o vydavateli: | John Wiley and Sons Inc, 2023. |
| Rok vydání: | 2023 |
| Témata: | crystal misorientation, nacre, nanoindentation, synthetic spherulites, toughening, Calcium Carbonate, Minerals, Nacre, Animals, Animal Shells/chemistry, Calcium Carbonate/chemistry, Minerals/chemistry, Anthozoa, Nacre/chemistry, Biominerals, Living organisms, Misorientations, Molecular scale, Nano indentation, Polycrystalline, Synthetic spherulite, Vaterite, Materials Science (all), Mechanics of Materials, Mechanical Engineering, General Materials Science, Engineering, computing & technology, Ingénierie, informatique & technologie |
| Popis: | Biominerals are organic-mineral composites formed by living organisms. They are the hardest and toughest tissues in those organisms, are often polycrystalline, and their mesostructure (which includes nano- and microscale crystallite size, shape, arrangement, and orientation) can vary dramatically. Marine biominerals may be aragonite, vaterite, or calcite, all calcium carbonate (CaCO3 ) polymorphs, differing in crystal structure. Unexpectedly, diverse CaCO3 biominerals such as coral skeletons and nacre share a similar characteristic: Adjacent crystals are slightly misoriented. This observation is documented quantitatively at the micro- and nanoscales, using polarization-dependent imaging contrast mapping (PIC mapping), and the slight misorientations are consistently between 1° and 40°. Nanoindentation shows that both polycrystalline biominerals and abiotic synthetic spherulites are tougher than single-crystalline geologic aragonite. Molecular dynamics (MD) simulations of bicrystals at the molecular scale reveal that aragonite, vaterite, and calcite exhibit toughness maxima when the bicrystals are misoriented by 10°, 20°, and 30°, respectively, demonstrating that slight misorientation alone can increase fracture toughness. Slight-misorientation-toughening can be harnessed for synthesis of bioinspired materials that only require one material, are not limited to specific top-down architecture, and are easily achieved by self-assembly of organic molecules (e.g., aspirin, chocolate), polymers, metals, and ceramics well beyond biominerals. |
| Druh dokumentu: | journal article http://purl.org/coar/resource_type/c_6501 article peer reviewed |
| Jazyk: | English |
| Relation: | https://onlinelibrary.wiley.com/doi/pdf/10.1002/adma.202300373; urn:issn:0935-9648; urn:issn:1521-4095 |
| DOI: | 10.1002/adma.202300373 |
| Přístupová URL adresa: | https://orbi.uliege.be/handle/2268/305855 |
| Rights: | open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
| Přístupové číslo: | edsorb.305855 |
| Databáze: | ORBi |
| Abstrakt: | Biominerals are organic-mineral composites formed by living organisms. They are the hardest and toughest tissues in those organisms, are often polycrystalline, and their mesostructure (which includes nano- and microscale crystallite size, shape, arrangement, and orientation) can vary dramatically. Marine biominerals may be aragonite, vaterite, or calcite, all calcium carbonate (CaCO3 ) polymorphs, differing in crystal structure. Unexpectedly, diverse CaCO3 biominerals such as coral skeletons and nacre share a similar characteristic: Adjacent crystals are slightly misoriented. This observation is documented quantitatively at the micro- and nanoscales, using polarization-dependent imaging contrast mapping (PIC mapping), and the slight misorientations are consistently between 1° and 40°. Nanoindentation shows that both polycrystalline biominerals and abiotic synthetic spherulites are tougher than single-crystalline geologic aragonite. Molecular dynamics (MD) simulations of bicrystals at the molecular scale reveal that aragonite, vaterite, and calcite exhibit toughness maxima when the bicrystals are misoriented by 10°, 20°, and 30°, respectively, demonstrating that slight misorientation alone can increase fracture toughness. Slight-misorientation-toughening can be harnessed for synthesis of bioinspired materials that only require one material, are not limited to specific top-down architecture, and are easily achieved by self-assembly of organic molecules (e.g., aspirin, chocolate), polymers, metals, and ceramics well beyond biominerals. |
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| DOI: | 10.1002/adma.202300373 |