Controlling self-assembled perovskite-spinel nanostructures.
Controlling self-assembled perovskite-spinel nanostructures.
复制标题
DOI：
10.1021/nl060401y
复制
发表时间：
2006-06
期刊：
影响因子：
10.8
通讯作者：
Haimei Zheng;Q. Zhan;F. Zavaliche;M. Sherburne;F. Straub;M. Cruz;Long-qing Chen;U. Dahmen
中科院分区：
文献类型：
--
作者：
Haimei Zheng;Q. Zhan;F. Zavaliche;M. Sherburne;F. Straub;M. Cruz;Long-qing Chen;U. Dahmen
我们报告了一个发现，自组装钙钛矿尖晶石纳米结构可以简单地通过选择具有不同取向的单晶衬底进行控制。在模型BiFeO（3）-CoFe（2）O（4）系统中，（001）衬底导致在BiFeO（3）基质中的矩形CoFe（2）O（4）纳米柱;相反，（111）衬底导致在CoFe（2）O（4）基质中的三角形BiFeO（3）纳米柱，与两相的体积分数无关。这种戏剧性的反转归因于作为晶体的固有性质的表面能各向异性。
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 BiFeO(3)-CoFe(2)O(4) system, a (001) substrate results in rectangular-shaped CoFe(2)O(4) nanopillars in a BiFeO(3) matrix; in contrast, a (111) substrate leads to triangular-shaped BiFeO(3) nanopillars in a CoFe(2)O(4) 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.