Double disks shaped ZnO microstructures synthesized by one-step CTAB assisted hydrothermal methods

Double disks shaped ZnO microstructures have been synthesized by one-step CTAB assisted hydrothermal methods at 90 °C with different growth time. The scanning electron microscopy (SEM) and X-ray diffraction (XRD) results disclosed the double disks shaped morphology and hexagonal wurtzite structures. With the increase of growth time, the strain along a axis becomes relaxed while that along c axis becomes more compressed. This made the increase of defect-related visible emissions and the decrease of UV near-band-gap emissions. Based on the experimental results, surfactant (CTAB) and growth temperature are suggested as the key factors for the formation of the double disks shaped ZnO. A possible growth mechanism to form the double disks shaped ZnO have been provided.