Hexagonal symmetry radial whiskers of ZnO crystallized in aqueous solution

We developed an aqueous solution system to deposit and control the nucleation and crystal growth of ZnO. Ethylenediamine was used to promote deposition of ZnO from zinc acetate solution. Crystalline ZnO particles or particulate films were successfully fabricated at 60 degrees C. The morphology of ZnO particles was further controlled to a hexagonal cylinder shape, long ellipse shape or hexagonal symmetry radial whiskers having high aspect ratio. The morphology was controlled by changing the supersaturation degree. Moreover, their photoluminescence was investigated. The novel solution process will contribute to the development of future ZnO devices.