Controlling self-assembled perovskite-spinel nanostructures

Haimei Zheng, Qian Zhan, Florin Zavaliche, Matt Sherburne, Florian Straub, Maria P. Cruz, Long Qing Chen, Uli Dahmen, R. Ramesh

Research output: Contribution to journalArticlepeer-review

248 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)1401-1407
Number of pages7
JournalNano letters
Issue number7
StatePublished - Jul 1 2006

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering


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