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  Inherent role of water in damage tolerance of the prismatic mineral–organic biocomposite in the shell of Pinna nobilis

Bayerlein, B., Bertinetti, L., Bar-On, B., Blumtritt, H., Fratzl, P., & Zlotnikov, I. (2016). Inherent role of water in damage tolerance of the prismatic mineral–organic biocomposite in the shell of Pinna nobilis. Advanced Functional Materials, 26(21), 3663-3669. doi:10.1002/adfm.201600104.

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 Creators:
Bayerlein, Bernd1, Author              
Bertinetti, Luca2, Author              
Bar-On, Benny, Author
Blumtritt, Horst, Author
Fratzl, Peter1, Author              
Zlotnikov, Igor1, Author              
Affiliations:
1Peter Fratzl, Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863294              
2Luca Bertinetti (Indep. Res.), Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_2231637              

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Free keywords: biomaterials, glass transition, mineral–organic interfaces, nanomechanical characterization, relative humidity, toughness
 Abstract: The combination of high stiffness, strength, and toughness of many biological tissues is achieved through complex 3D arrangement of hard and soft components. While the hard building blocks are associated with the general stiffness of these biocomposite structures, the soft organic constituents provide the necessary flexibility and toughness and are susceptible to moisture uptake. Because many biological materials reside in humid environments, water is an inherent component of their microstructure. Hence, many studies have emphasized the effect of moisture content on mechanical performance of these materials. High toughness is indeed reported in materials, such as bone, teeth, mollusk shells, and glass sponges, when measured in high relative humidities, nevertheless, not much is known about the exact mechanisms that are responsible for this phenomenon. In the present work, newly developed environmentally controlled nanomechanical characterization techniques are employed to probe the prismatic layer in the shell of Pinna nobilis consisting of hard calcitic blocks surrounded by 1 μm thick organic matrix. Using spatially resolved mechanical data, it is demonstrated that water not only strongly affects the mechanical properties of the biocomposite tissue and its constituents but also is an integral part of explicit intrinsic and extrinsic toughening mechanisms revealed in this study.

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 Dates: 2016-03-302016
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1002/adfm.201600104
BibTex Citekey: ADFM:ADFM201600104
PMID: 0490
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Title: Advanced Functional Materials
  Other : Adv. Funct. Mater.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: 26 (21) Sequence Number: - Start / End Page: 3663 - 3669 Identifier: ISSN: 1616-301X