Abstract
Uniform and well-defined single-crystal NaTaO3 cubes were successfully synthesized through a solvothermal method using monodisperse meso-microporous Ta3N5 hollow spheres as precursors. The structure and morphology of NaTaO3 cubes were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resoluition transmission electron microscopy (HRTEM), energy-dispersive X-ray spectroscopy (EDX). The results show that the formation of NaTaO3 cubes follows the dissolution-recrystallization mechanism, and use of monodisperse Ta3N5 hollow spheres with a thin shell thickness as precursors is critical to obtain the uniform cube morphology of the products. The size of the NaTaO3 cubes can be tunable by adjusting the ratio of ethanol to water. Due to the highly monodisperse size and shape, the cubes can be further self-assembled into a high quality monolayer nanofilm.
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