Inhomogeneity of Nacre Lamellae on the Nanometer Length Scale

被引：61

作者：

Younis, Saeed ^{[1
]}

Kauffmann, Yaron ^{[1
]}

Bloch, Leonid ^{[1
]}

Zolotoyabko, Emil ^{[1
]}

机构：

[1] Technion Israel Inst Technol, Dept Mat Engn, IL-32000 Haifa, Israel

来源：

CRYSTAL GROWTH & DESIGN | 2012年 / 12卷 / 09期

关键词：

ANISOTROPIC LATTICE-DISTORTIONS; BIOGENIC CALCITE; ELECTRON TOMOGRAPHY; MOLLUSK SHELLS; NANOSCALE; LESSONS; VIEW; BIOMINERALIZATION; MACROMOLECULES; MICROSTRUCTURE;

D O I：

10.1021/cg3007734

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We present experimental evidence of inhomogeneous distribution of organic inclusions within individual aragonitic lamellae forming the nacre layer of mollusk shells. This nanoscale-inhomogeneity is visualized in the Perna canaliculus (green mussel) shells by the aid of high-angle annular dark field scanning transmission electron microscopy (IAADF-STEM) in the tomography mode. Electron tomography reconstructions of the three-dimensional distribution of intracrystalline organic inclusions, ranging in size between 2 to 25 nm, clearly reveal 50 nm wide depletion zones adjacent to the organic sheets between lamellae. The interrelation between the observed fine-scale inhomogeneity of nacre layer and its improved mechanical properties is discussed.

引用

页码：4574 / 4579

页数：6

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