Epitaxial growth of anisotropically shaped, single-crystal particles of cubic SrTiO3

A novel method for synthesizing anisotropically shaped particles of materia ls having cubic symmetry is reported. Anisotropically shaped single-crystal particles of cubic SrTiO3 were obtained by epitaxial growth on tabular tet ragonal Sr3Ti2O7. Transmission electron microscopy revealed that both the s hape and the size of the single-crystal particles was regulated by selectin g a precursor material that can act as a reaction site in molten KCl and ha s an epitaxial relation with SrTiO3. The [001] and [110] directions of tabu lar SrTiO3 are parallel to the [001] and [110] directions of the Sr3Ti2O7 h ost particle, respectively. Tabular SrTiO3 particles with rectangular faces having an edge length of 10-20 mu m and a thickness of similar to 2 mu m w ere obtained by reacting TiO2 and tabular Sr3Ti2O7 particles of the same ed ge length in molten KCl.