| Synthesis of tetrapod-shaped ZnO whiskers and microrods in one crucible by thermal evaporation of Zn/C mixtures |
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| 作者姓名： | 杜国平 李旺 付敏恭 陈楠 付雪 万益群 严明明 |
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| 作者单位： | [1]School of Materials Science and Engineering, Nanchang University, Nanchang 330031, China [2]Center for Analysis and Testing, Nanchang University, Nanchang 330047, China [3]Department of Systems Science, Jiangxi University of Finance and Economics, Nanchang 330013, China |
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| 基金项目： | Project（0061） supported by the Doctorate Foundation of Nanchang University, China; Project（2006015） supported by the Center for Analysis and Testing, Nanchang University, China |
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| 摘 要： | Tetrapod-shaped ZnO whiskers and microrods were synthesized in one crucible by thermal evaporation of Zn/C mixtures at 930 ℃ in air without any catalyst. The digital camera, optical microscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction techniques were used to study the morphologies and crystal structures of these tetrapod-shaped ZnO microcrystals. The results show that these two types of ZnO tetrapods are grown at different heights within the same crucible. The legs of these tetrapod-shaped ZnO crystals are hexagonally faceted. Some tetrapod-shaped ZnO whiskers show hierarchical structures. A short button-like hexagonal ZnO microcrystal is observed at the triple junctions of some tetrapod-shaped ZnO whiskers. The tetrapod-shaped ZnO microrods are capped by two sets of hexagonal pyramids with two different groups of crystal planes for the surfaces. These two types of tetrapod-shaped ZnO microcrystals have different side faces and aspect ratio, which are believed to be the result of their different growth behaviors. The octa-twin model was used to discuss the different growth behaviors of these two types of ZnO tetrapods. The crystal planes of the legs and the pyramids were determined.
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| 关 键 词： | ZnO 四角防波石 合成方法 坩锅 Zn/C混合物 |
| 收稿时间： | 2007-03-21 |
| 修稿时间： | 2007-07-25 |
Synthesis of tetrapod-shaped ZnO whiskers and microrods in one crucible by thermal evaporation of Zn/C mixtures |
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| DU Guo-ping,LI Wang,FU Min-gong,CHEN Nan,FU Xue,WAN Yi-qun,YAN Ming-ming.Synthesis of tetrapod-shaped ZnO whiskers and microrods in one crucible by thermal evaporation of Zn/C mixtures[J].Transactions of Nonferrous Metals Society of China,2008,18(1):155-161. |
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| Authors: | DU Guo-ping LI Wang FU Min-gong CHEN Nan FU Xue WAN Yi-qun YAN Ming-ming |
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| Affiliation: | [1]School of Materials Science and Engineering, Nanchang University, Nanchang 330031, China; [2]Center for Analysis and Testing, Nanchang University, Nanchang 330047, China; [3]Department of Systems Science, Jiangxi University of Finance and Economics, Nanchang 330013, China |
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| Abstract: | Tetrapod-shaped ZnO whiskers and microrods were synthesized in one crucible by thermal evaporation of Zn/C mixtures at 930 ℃ in air without any catalyst. The digital camera, optical microscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction techniques were used to study the morphologies and crystal structures of these tetrapod-shaped ZnO microcrystals. The results show that these two types of ZnO tetrapods are grown at different heights within the same crucible. The legs of these tetrapod-shaped ZnO crystals are hexagonally faceted. Some tetrapod-shaped ZnO whiskers show hierarchical structures. A short button-like hexagonal ZnO microcrystal is observed at the triple junctions of some tetrapod-shaped ZnO whiskers. The tetrapod-shaped ZnO microrods are capped by two sets of hexagonal pyramids with two different groups of crystal planes for the surfaces. These two types of tetrapod-shaped ZnO microcrystals have different side faces and aspect ratio, which are believed to be the result of their different growth behaviors. The octa-twin model was used to discuss the different growth behaviors of these two types of ZnO tetrapods. The crystal planes of the legs and the pyramids were determined. |
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| Keywords: | ZnO tetrapod-shaped whiskers tetrapod-shaped microrods growth from vapor octa-twin model |
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