Abstract— Hydrothermal method was used to prepare ZnO nanostructure .This study haven’t used any catalyst or buffer layer before the reaction. The process has taken place inside Teflon lined stainless steel autoclave with volume 100 ml (homemade). ZnO nanotubes, lettuce leaf nanostructure, and nanosticks were successfully synthesized using ZnO nanoparticles (20-30 nanometers) and NaOH (concentrations 6M) which was the starting materials for the chemical reaction under stirring. The suspension was transferred into a Teflon lined sealed stainless steel autoclave and kept at 70 0C for 24, 48, and 72 hour. The influence of the time reaction of synthesis process on the morphology, the crystallinity and structural properties are studied by X-ray diffraction and field emission scanning electron microscope (FE-SEM), the experimental pattern of the films show that diffraction peaks can be assigned to the Wurtzite hexagonal-shaped ZnO as shown in the FE-SEM pictures, also the morphology of the films studied by atomic force microscope (AFM) shows that the prepared thick films have high roughness specially for the powder prepared 48 h .
Keywords— ZnO, nanotubes, lettuce leaf structure, nanosticks, dislocation density.
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