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A study of the size-dependent elastic properties of ZnO nanowires and nanotubes

机译:ZnO纳米线和纳米管的尺寸依赖性弹性性能研究

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摘要

We present our calculations of the Young's modulus of ZnO nanowires and nanotubes by using the empirical Buckingham-type potential. Our results indicate that the Young's moduli of ZnO nanowires increase as the diameters decrease, and the Young's moduli of ZnO nanotubes increase as the thicknesses decrease. Furthermore, we find that such size-dependent elastic properties mainly arise from the lateral facets of the nanowires and nanotubes. In particular, for a ZnO nanotube with a thin wall, the Coulomb interaction between the ions of the outer and inner atomic layers plays an important role in the Young's moduli of the surface atomic layers.
机译:我们使用经验的白金汉型势,介绍了ZnO纳米线和纳米管的杨氏模量的计算。我们的结果表明,ZnO纳米线的杨氏模量随直径的减小而增加,而ZnO纳米线的杨氏模量随厚度的减小而增加。此外,我们发现这种与尺寸有关的弹性主要来自纳米线和纳米管的侧面。特别地,对于具有薄壁的ZnO纳米管,外和内原子层的离子之间的库仑相互作用在表面原子层的杨氏模量中起重要作用。

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