Abstract
ZnO crystals with controllable morphology were synthesized by employing the different source materials. A simple thermal evaporation technique was employed to synthesize ZnO crystals. Morphologies such as tetrapods and inverted cone-shaped rods were realized experimentally through thermal evaporation of Zn and ZnS powder, respectively. The morphology of ZnO crystals could also be controlled by designing the source material. Peculiar ZnO tetrapods with inverted cone-shaped legs were obtained via thermal evaporation of a mixture of Zn and ZnS powder mixed with a certain ratio. The intensity of green emission in the photoluminescence spectrum increased with the increase in the ratio of ZnS to Zn in the source material.
