Solution synthesis and growth mechanism of SrTiO sub(3) mesocrystals

Single-crystalline SrTiO sub(3) mesocrystals were synthesized viasol-precipitation coupled with a hydrothermal process using oleic acid as a capping agent. To clarify the growth mechanism, the time-dependence morphology, size, and growth process of SrTiO sub(3) mesocrystal were investigated. SrTiO sub(3) mesocrystals formed from oriented aggregates of Sr-Ti-O nanorods, which were subsequently transformed into irregular morphologies viathe formation of the SrTiO sub(3) phase. Then oriented fusion of the irregular particles gave a mesocrystal structure. The addition of oleic acid accelerated the formation of Sr-Ti-O nanorods, oriented the fusion of irregular SrTiO sub(3) particles, and formed the cubic morphology of SrTiO sub(3) mesocrystals.