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Selective growth of ZnO nanoneedles by thermal oxidation of Zn microstructures

机译:通过热氧化锌微结构选择性生长ZnO纳米针

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摘要

Zinc film containing hexagonal plate stack and tower-like microstructures were grown on Si substrates at high temperature by thermal evaporation. Thermal oxidation studies on these microstructures have shown that ZnO nanoneedles selectively grow from the facets of the zinc microstructure at temperature above 300 C in atmosphere. TEM analysis showed that single crystalline and bicrystalline nanoneedles were formed in this oxidation process and the growth direction of these nanoneedles was identified along the [1120]. Based on the structural studies and morphological observation, we have proposed a possible mechanism for the selective growth of ZnO nanoneedles during thermal oxidation.
机译:在高温下,通过热蒸发在Si衬底上生长包含六角形板堆叠和塔状微结构的锌膜。对这些微结构的热氧化研究表明,ZnO纳米针在大气中高于300 C的温度下从锌微结构的小面选择性生长。 TEM分析表明,在此氧化过程中形成了单晶和双晶纳米针,并沿[1120]确定了这些纳米针的生长方向。基于结构研究和形态观察,我们提出了在热氧化过程中选择性生长ZnO纳米针的可能机制。

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