Abstract
Flower-like ZnO microstructures have been synthesized by polyethylene glycol (PEG)-assisted hydrothermal method using Zn(NO3)2·6H2O and NH3·H2O as raw materials at 120°C for 24h. The products were characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The results show that the ZnO samples prepared with PEG4000 exhibit flower-like morphology and hexagonal wurtzite structure with sizes of 5–20μm. The flower-like ZnO microstructures are mainly composed of rod-like crystals with sharp end structures. The photoluminescence spectrum of the flower-like ZnO microstructures at room temperature shows four emission peaks at 362, 392, 421 and 485nm.
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