Controlling Self-Assembled Perovskite−Spinel Nanostructures
- 14 June 2006
- journal article
- Published by American Chemical Society (ACS) in Nano Letters
- Vol. 6 (7), 1401-1407
- https://doi.org/10.1021/nl060401y
Abstract
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.Keywords
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