Multiscale structure of sheet nacre. - INSU - Institut national des sciences de l'Univers Access content directly
Journal Articles Biomaterials Year : 2005

Multiscale structure of sheet nacre.

Abstract

This work was conducted on Pinctada maxima nacre (mother of pearl) in order to understand its multiscale ordering and the role of the organic matrix in its structure. Intermittent-contact atomic force microscopy with phase detection imaging reveals a nanostructure within the tablet. A continuous organic framework divides each tablet into nanograins. Their shape is supposed to be flat with a mean extension of 45 nm. TEM performed in the darkfield mode evidences that at least part of the intracrystalline matrix is crystallized and responds like a ‘single crystal'. The tablet is a ‘hybrid composite'. The organic matrix is continuous. The mineral phase is thus finely divided still behaving as a single crystal. It is proposed that each tablet results from the coherent aggregation of nanograins keeping strictly the same crystallographic orientation thanks to a hetero-epitaxy mechanism. Finally, high-resolution TEM performed on bridges from one tablet to the next, in the overlying row, did not permit to evidence a mineral lattice but crystallized organic bridges. The same organic bridges were evidenced by SEM in the interlaminar sequence.

Domains

Mineralogy
Fichier principal
Vignette du fichier
Rouuseau-Biomaterials-2005.pdf (1.32 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive
Loading...

Dates and versions

hal-00023492 , version 1 (06-07-2007)

Identifiers

Cite

Marthe Rousseau, Evelyne Lopez, Philippe Stempflé, Marcel Brendlé, Loïc Franke, et al.. Multiscale structure of sheet nacre.. Biomaterials, 2005, 26, pp.31 6-626. ⟨10.1016/j.biomaterials.2005.03.028⟩. ⟨hal-00023492⟩
244 View
1284 Download

Altmetric

Share

Gmail Facebook X LinkedIn More