Three-dimensional six-fold symmetry ZnO sub-microstructures

Three-dimensional (3D) six-fold symmetry ZnO sub-microstructures were prepared by using a low temperature (80 °C) solution method. The 3D structure has unique configuration, i.e., a support core with six symmetric branches located on its middle. It was found that the structure can only be produced in a critical basicity condition, i.e., pH=11.8±0.2. The formation mechanism of the 3D structure involves the enhancing effect on the growth of ZnO [0 0 0 1] direction and the secondary nucleation process. The 3D sub-microstructure is likely to be candidate as building block for nano-electromechanical system (NEMS) and nanomachines, i.e., act as a gear.