Jong Seto, Yurong Ma, Sean A. Davis, Fiona Meldrum, Aurelien Gourrier, Yi-Yeoun Kim, Uwe Schilde, Michael Sztucki, Manfred Burghammer, Sergey Maltsev, Christian Jäger, Helmut Cölfen
- Structuring overmany length scales is a design strategy widely used in Nature to create materials with unique functional properties. We here present a comprehensive analysis of an adult sea urchin spine, and in revealing a complex, hierarchical structure, showhow Nature fabricates a material which diffracts as a single crystal of calcite and yet fractures as a glassy material. Each spine comprises a highly oriented array of Mg-calcite nanocrystals in which amorphous regions and macromolecules are embedded. It is postulated that this mesocrystalline structure forms via the crystallization of a dense array of amorphous calcium carbonate (ACC) precursor particles. A residual surface layer of ACC and/or macromolecules remains around the nanoparticle units which creates the mesocrystal structure and contributes to the conchoidal fracture behavior. Nature's demonstration of howcrystallization of an amorphous precursor phase can create a crystalline material with remarkable properties therefore provides inspiration for a novel approach toStructuring overmany length scales is a design strategy widely used in Nature to create materials with unique functional properties. We here present a comprehensive analysis of an adult sea urchin spine, and in revealing a complex, hierarchical structure, showhow Nature fabricates a material which diffracts as a single crystal of calcite and yet fractures as a glassy material. Each spine comprises a highly oriented array of Mg-calcite nanocrystals in which amorphous regions and macromolecules are embedded. It is postulated that this mesocrystalline structure forms via the crystallization of a dense array of amorphous calcium carbonate (ACC) precursor particles. A residual surface layer of ACC and/or macromolecules remains around the nanoparticle units which creates the mesocrystal structure and contributes to the conchoidal fracture behavior. Nature's demonstration of howcrystallization of an amorphous precursor phase can create a crystalline material with remarkable properties therefore provides inspiration for a novel approach to the design and synthesis of synthetic composite materials.…
MetadatenVerfasserangaben: | Jong Seto, Yurong Ma, Sean A. Davis, Fiona Meldrum, Aurelien Gourrier, Yi-Yeoun Kim, Uwe SchildeORCiDGND, Michael Sztucki, Manfred Burghammer, Sergey Maltsev, Christian Jäger, Helmut CölfenGND |
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DOI: | https://doi.org/10.1073/pnas.1109243109 |
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ISSN: | 0027-8424 |
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Titel des übergeordneten Werks (Englisch): | Proceedings of the National Academy of Sciences of the United States of America |
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Verlag: | National Acad. of Sciences |
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Verlagsort: | Washington |
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Publikationstyp: | Wissenschaftlicher Artikel |
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Sprache: | Englisch |
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Jahr der Erstveröffentlichung: | 2012 |
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Erscheinungsjahr: | 2012 |
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Datum der Freischaltung: | 26.03.2017 |
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Freies Schlagwort / Tag: | calcium carbonate biomineralization; echinoderm skeleton; hierarchical structuring; mesocrystal; skeletal elements |
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Band: | 109 |
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Ausgabe: | 10 |
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Seitenanzahl: | 6 |
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Erste Seite: | 3699 |
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Letzte Seite: | 3704 |
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Fördernde Institution: | Max Planck Society; German Research Foundation (DFG) [SPP 1117]; EPSRC
[EP/E037364/2]; EU [MEST-CT-2004-504465] |
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Organisationseinheiten: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie |
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Peer Review: | Referiert |
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