Large-scale synthesis of perpendicular side-faceted one-dimensional ZnO nanocrystals

A novel route to the rational fabrication of narrow one-dimensional ZnO nanocrystals with perpendicular side facets is demonstrated in alcoholic solutions. The synthesis involves no-template or no-substrate solution method, which still allows the oriented growth of ZnO nanostructures at large-scale, low-cost, and moderate temperatures. The management consists of monitoring of the nucleation, growth, and aging processes by means of chemical and solvent control of the interfacial free energy. It enables the control of the size of nano-, meso-, and microcrystallites with various aspects from cubes to rods, wires, and belts.