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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Growth and properties of ZnO/hexagonal ZnMgO/cubic ZnMgO nanopagoda heterostructures
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Growth and properties of ZnO/hexagonal ZnMgO/cubic ZnMgO nanopagoda heterostructures

机译：ZnO /六角形ZnMgO /立方ZnMgO纳米塔异质结构的生长和性能

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摘要

Quasialigned ZnO/ hexagonal ZnMgO/ cubic ZnMgO nanopagoda heterostructures have been synthesized by a simple thermal evaporation method using Zn and Mg metals as raw materials. The structural, compositional and optical properties were investigated by field emission scanning electron microscopy, energy- dispersive spectroscopy, x- ray diffraction, high- resolution transmission electron microscopy and room- temperature photoluminescence. The cubic ZnMgO structure was grown on the hexagonal ZnMgO interlayer and the ZnO nucleating layer. The nanopagodas are about 600 nm at the bottom and 70 nm at the top in diameter. The molar ratio of Zn- to- Mg decreases in the nanopagodas along the direction of the tip, while the average is 0.41 : 0.59. With Mg incorporation in the hexagonal ZnMgO interlayer, the ultraviolet near- band- edge emission shows a clear blueshift of 260 meV.
机译：通过简单的热蒸发法，以锌和镁金属为原料，合成了准取向ZnO /六角形ZnMgO /立方ZnMgO纳米塔异质结构。通过场发射扫描电子显微镜，能量色散光谱，x射线衍射，高分辨率透射电子显微镜和室温光致发光对结构，组成和光学性质进行了研究。在六边形ZnMgO中间层和ZnO成核层上生长了立方ZnMgO结构。纳米塔的底部直径约为600 nm，顶部直径约为70 nm。 Zn-Mg的摩尔比在纳米塔中沿着尖端方向降低，而平均值为0.41：0.59。通过在六角形ZnMgO中间层中掺入Mg，紫外线的近能带发射显示出260 meV的明显蓝移。

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