Structure-property relationships of a biological mesocrystal in the adult sea urchin spine

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2012
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Ma, Yurong
Davis, Sean A.
Meldrum, Fiona
Gourrier, Aurelien
Kim, Yi-Yeoun
Schilde, Uwe
Sztucki, Michael
Burghammer, Manfred
Maltsev, Sergey
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Structuring over many 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, show how 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 how crystallization 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.

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540 Chemie
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Calcium carbonate biomineralization, echinoderm skeleton, hierarchical structuring, mesocrystal, skeletal elements
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ISO 690SETO, Jong, Yurong MA, Sean A. DAVIS, Fiona MELDRUM, Aurelien GOURRIER, Yi-Yeoun KIM, Uwe SCHILDE, Michael SZTUCKI, Manfred BURGHAMMER, Sergey MALTSEV, Christian JÄGER, Helmut CÖLFEN, 2012. Structure-property relationships of a biological mesocrystal in the adult sea urchin spine. In: Proceedings of the National Academy of Sciences. 2012, 109(10), pp. 3699-3704. ISSN 0027-8424. eISSN 1091-6490. Available under: doi: 10.1073/pnas.1109243109
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@article{Seto2012-03-06Struc-22782,
  year={2012},
  doi={10.1073/pnas.1109243109},
  title={Structure-property relationships of a biological mesocrystal in the adult sea urchin spine},
  number={10},
  volume={109},
  issn={0027-8424},
  journal={Proceedings of the National Academy of Sciences},
  pages={3699--3704},
  author={Seto, Jong and Ma, Yurong and Davis, Sean A. and Meldrum, Fiona and Gourrier, Aurelien and Kim, Yi-Yeoun and Schilde, Uwe and Sztucki, Michael and Burghammer, Manfred and Maltsev, Sergey and Jäger, Christian and Cölfen, Helmut}
}
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