Characterization of ZnO Tetrapods Prepared by a Simple Oxidation of Zn Plate in Air Atmosphere
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概要
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ZnO tetrapods were synthesized by a simple evaporation and oxidation of Zn plate in air atmosphere. The Zn plate was placed in an alumina crucible and the crucible was simply inserted into a furnace at 930 °C without any additives. The oxidation time was changed in the range of 30 to 120 min to investigate the effect of oxidation time on the morphology and optical property of ZnO tetrapods. The X-ray diffraction (XRD) results showed the ZnO tetrapods had wurtzite structure. The field emission scanning electron microscopy (SEM) images revealed that the shape of the tetrapod legs changed from needle to hexagonal shape, and then to cylindrical shape with the increase in oxidation time. On the other hand, the highest UV/green emission ratio was observed for the ZnO tetrapods which consisted of legs with hexagonal shape. In addition, the dead spots in cathodoluminescence (CL) images were observed at the center of the tetrapods.
- 2012-06-25
著者
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Lee Geun-hyoung
Department Of Advanced Materials Engineering Dong-eui University
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Lee Geun-Hyoung
Department of Materials and Components Engineering, Electro Ceramic Center, Dong-eui University, Busan 613-714, Republic of Korea
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Bae Du-han
Department of Materials and Components Engineering, Electro Ceramic Center, Dong-eui University, Busan 613-714, Republic of Korea
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