Coherently aligned nanoparticles within a biogenic single crystal: A biological prestressing strategy.
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| Title: | Coherently aligned nanoparticles within a biogenic single crystal: A biological prestressing strategy. |
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| Authors: | Polishchuk, Iryna, Bracha, Avigail Aronhime, Bloch, Leonid, Levy, Davide, Kozachkevich, Stas, Etinger-Geller, Yael, Kauffmann, Yaron, Burghammer, Manfred, Giacobbe, Carlotta, Villanova, Julie, Hendler, Gordon, Chang-Yu Sun, Giuffre, Anthony J., Marcus, Matthew A., Kundanati, Lakshminath, Zaslansky, Paul, Pugno, Nicola M., Gilbert, Pupa U. P. A., Katsman, Alex, Pokroy, Boaz |
| Source: | Science (pre-March 2025). 12/8/2017, Vol. 358 Issue 6368, p1294-1298. 5p. |
| Subjects: | Biomineralization, Nanoparticles analysis, Guinier-Preston zones, Biomedical materials, Single crystals |
| Abstract: | In contrast to synthetic materials, materials produced by organisms are formed in ambient conditions and with a limited selection of elements. Nevertheless, living organisms reveal elegant strategies for achieving specific functions, ranging from skeletal support to mastication, from sensors and defensive tools to optical function. Using state-of-the-art characterization techniques, we present a biostrategy for strengthening and toughening the otherwise brittle calcite optical lenses found in the brittlestar Ophiocoma wendtii. This intriguing process uses coherent nanoprecipitates to induce compressive stresses on the host matrix, functionally resembling the Guinier-Preston zones known in classical metallurgy. We believe that these calcitic nanoparticles, being rich in magnesium, segregate during or just after transformation from amorphous to crystalline phase, similarly to segregation behavior from a supersaturated quenched alloy. [ABSTRACT FROM AUTHOR] |
| Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Psychology and Behavioral Sciences Collection |
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| Abstract: | In contrast to synthetic materials, materials produced by organisms are formed in ambient conditions and with a limited selection of elements. Nevertheless, living organisms reveal elegant strategies for achieving specific functions, ranging from skeletal support to mastication, from sensors and defensive tools to optical function. Using state-of-the-art characterization techniques, we present a biostrategy for strengthening and toughening the otherwise brittle calcite optical lenses found in the brittlestar Ophiocoma wendtii. This intriguing process uses coherent nanoprecipitates to induce compressive stresses on the host matrix, functionally resembling the Guinier-Preston zones known in classical metallurgy. We believe that these calcitic nanoparticles, being rich in magnesium, segregate during or just after transformation from amorphous to crystalline phase, similarly to segregation behavior from a supersaturated quenched alloy. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 00368075 |
| DOI: | 10.1126/science.aaj2156 |
