%0 Journal Article
%K anisotropy
%K oxide
%K Perovskite
%K oxides
%K substrates
%K chemistry
%K nanostructured materials
%K Nanostructures
%K bismuth compounds
%K Article
%K Single crystals
%K titanium
%K Calcium compounds
%K Single crystal substrates
%K calcium derivative
%K nanomaterial
%K Nanopillars
%K Self assembly
%K Perovskite spinel nanostructures
%K Surface energy anisotropy
%K Interfacial energy
%K aluminum oxide
%K magnesium oxide
%K spinell
%A H Zheng
%A Q Zhan
%A F Zavaliche
%A M Sherburne
%A F Straub
%A M.P Cruz
%A L.-Q Chen
%A U Dahmen
%A Ramamoorthy Ramesh
%B Nano Letters
%D 2006
%G eng
%P 1401-1407
%R 10.1021/nl060401y
%T Controlling self-assembled perovskite-spinel nanostructures
%V 6
%X 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 2O 4 system, a (001) substrate results in rectangular-shaped CoFe 2O 4 nanopillars in a BiFeO 3 matrix; in contrast, a (111) substrate leads to triangular-shaped BiFeO 3 nanopillars in a CoFe 2O 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. © 2006 American Chemical Society.