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
收藏
页码：4574 / 4579
页数：6
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