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首页> 外文期刊>Crystal growth & design >Self-organized ZnO microcombs with cuboid nanobranches by simple thermal evaporation
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Self-organized ZnO microcombs with cuboid nanobranches by simple thermal evaporation

机译：通过简单的热蒸发，具有长方体纳米支的自组织ZnO微梳

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摘要

Microscale wide and millimeters long comblike ZnO single crystals with well-aligned cuboid nanobranches were fabricated using a double-tube simple thermal evaporation method without the presence of a catalyst at 950 degrees C. X-ray diffraction and Raman spectra revealed that the as-grown products had a wurtzite crystal structure. The morphology and microstructure analyses of ZnO microcombs were performed by field emission scanning electron microscopy and transmission electron microscopy. The ZnO microcombs were about 1-3 millimeters in length, with branching rods about 40 mu m in length and 500-800 nm in width. Selected area electron diffraction confirmed that the branching rods and ribbon stems grew along the [0001] and [01 (1) over bar0] in each direction, respectively. Photoluminescence measurement of the microcombs showed a weak UV emission band and a broad yellow-green emission band centered at 395 and 530 nm, respectively. A possible growth mechanism based on different preferred growth orientations of ribbon stems and branching rods was also proposed.
机译：使用双管简单热蒸发方法在950℃下不存在催化剂的情况下，制备了具有良好排列的长方体纳米支的微米级宽和毫米长的梳状ZnO单晶。X射线衍射和拉曼光谱表明，所生长的产品具有纤锌矿晶体结构。通过场发射扫描电子显微镜和透射电子显微镜对ZnO微梳的形貌和微观结构进行了分析。 ZnO微梳的长度约为1-3毫米，分支棒的长度约为40微米，宽度约为500-800纳米。选定区域的电子衍射证实，分支棒和带状茎分别在每个方向上沿着[0001]和bar01上的[01（1）增长。微梳的光致发光测量显示出弱的紫外线发射带和宽的黄绿色发射带，分别位于395和530 nm。还提出了基于带状茎和分支杆的不同优选生长方向的可能的生长机理。

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