Controlling self-assembled perovskite-spinel nanostructures

被引：239
作者：
Zheng, Haimei [1 ]
Zhan, Qian
Zavaliche, Florin
Sherburne, Matt
Straub, Florian
Cruz, Maria P.
Chen, Long-Qing
Dahmen, Uli
Ramesh, R.
机构：
[1] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA
[2] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
[3] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA
[4] Natl Ctr Electron Microscopy, Lawrence Berkeley Lab, Berkeley, CA 94720 USA
来源：
NANO LETTERS | 2006年 / 6卷 / 07期
关键词：
AB-INITIO; ORGANIZED GROWTH; SRTIO3; SURFACES; TRANSITIONS; CRYSTALS; BATIO3; ENERGY; FILMS; SHAPE;
D O I：
10.1021/nl060401y
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We report a discovery that self-assembled perovskite-spinel nanostructures can be controlled simply by selecting single-crystal substrates with different orientations. In a model BiFeO3-CoFe2O4 system, a ( 001) substrate results in rectangular-shaped CoFe2O4 nanopillars in a BiFeO3 matrix; in contrast, a (111) substrate leads to triangular-shaped BiFeO3 nanopillars in a CoFe2O4 matrix, irrespective of the volume fraction of the two phases. This dramatic reversal is attributed to the surface energy anisotropy as an intrinsic property of a crystal.
引用
收藏
页码：1401 / 1407
页数：7
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