Hexagonal Ring Submicro- and Nanocrystals of a La–Hexacyanoferrate Coordination Polymer

Hexagonal disk crystals of a La–hexacyanoferrate coordination polymer were obtained by reversed micelle technique. The {001} surface capping of the surfactants leads to the hexagonal disk shape evolution with the completely developed {001} surface. The hexagonal disks are changed into hexagonal rings through spontaneous and anisotropic surface etching along the [001] direction from both sides of the hexagonal disk.