Templateless, surfactantless, electrochemical route to a cuprous oxide microcrystal: from octahedra to monodisperse colloid spheres.

Herein we report a simple electrochemical route for the controlled synthesis of a Cu2O microcrystal from perfect octahedra to monodisperse colloid spheres via control of the electrodeposition potential without the introduction of any template or surfactant. Perfect Cu2O octahedra and monodisperse colloid spheres have been obtained in high yield (approximately 100%).