Characterization of ZnO Nanostructures Synthesized through a Thermal Oxidation of Zn--C Mixture in Air
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概要
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Tetrapod-shaped ZnO crystals were synthesized via a simple oxidation process of Zn--C mixture in air at atmospheric pressure. The influence of carbon on the morphology and optical properties of the ZnO crystals was investigated. The ZnO crystals were characterized with an X-ray diffractometer (XRD), a scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and a cathodoluminescence (CL) spectroscopy. With increasing the carbon content in Zn source material, the size of ZnO tetrapods increased significantly. However, tetrapod-shaped ZnO crystals were not found from Zn--C mixture with a weight ratio of $1:1$, indicating that carbon had an effect on the morphology of ZnO crystals as well as the size of tetrapods. CL spectra of the ZnO crystals exhibited a strong ultraviolet (UV) emission peak at 380 nm and a weak green emission peak at 510 nm. As the carbon content increased, the intensity of UV emission decreased and the green emission increased.
- 2011-01-25
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, Dong-eui University, Busan 614-714, Republic of Korea
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