Solution-Based Growth of Monodisperse Cube-Like BaTiO3 Colloidal Nanocrystals

Free-standing, monodisperse cubic BaTiO3 colloidal nanocrystals have been prepared by a hydrothermal route at temperatures as low as 135 °C. Raman spectroscopy measurements and photoluminescence measured in the cube-like 20 nm BaTiO3 nanocrystals strongly suggest the existence of a tetrragonal distortion due to an “off-center” shift of the Ti4+ ions within the TiO6 octahedra.