Controlling self-assembled perovskite-spinel nanostructures

被引：241

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

页码：1401 / 1407

页数：7

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