In this study, highly crystallized ZnO nanorods produced with hexagonal prism-like, tower-like and tip-like ends were successfully synthesized from the starting raw material of Zn_3N_2 powder. The experimental results indicate that the different morphologies of the ends of nanorods depend on the concentration of NH_3 in the hydrothermal process. Furthermore, the size of the nanorods is significantly influenced by the synthesis temperature. Nanorods of a small diameter (about 10 nm), for example, can be produced at low temperatures. A possible growth mechanism is proposed for the formation of nanorods that exhibit different end morphologies.
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