Molecular construction of oriented crystalline NaMnF₃ and KMnF₃ with perovskite structures at room temperature

In this work, we report the fabrication of high-quality (101)-oriented orthorhombic NaMnF₃ and (100)-oriented cubic KMnF₃ perovskites via an organic monolayer template at room temperature. The controlled crystallization under the organic monolayer template is explained in terms of the electrostatic interactions and beneficial lattice matching between the organic template and the ions undergoing nucleation. The present study is of great importance in the preparation of oriented perovskite materials as well as in the understanding of the mechanism for organic-template-directed crystallization.