氧化物金字塔

Terraced hollow oxide pyramids

摘要: 文章作者利用原位电子显微镜技术实时地观察在(100)Cu氧化过程中氧化亚铜金字塔的生长过程.观察结果表明，这些氧化物最初具有正方形结构, 随着生长的继续, 这些正方形结构转变成台阶状金字塔. 原子力显微镜观察表明，这些氧化物金字塔具有中空结构. 文章作者提出了一个简单的弹性－塑性变形机理对该新颖结构的形成进行了解释.
- 氧化 /
- 纳米结构 /
- 透射电子显微镜
Abstract: we report in situ transmission electron microscope dynamic observations of the growth of Cu2O islands during oxidation of (100)Cu thin films at ~900°C, which show that the oxide islands have an initially square shape that transits to a terraced pyramid morphology as growth proceeds. The surface topology obtained from ex situ AFM observation reveals that the terraced oxide pyramids have a hollow structure. A simple mechanical mechanism based on elastic-plastic deformation, instead of the kinetic/thermodynamic mechanism that is typically used to describe nanostructure evolution, is proposed to explain the formation of this completely new oxide structure.
- oxidation /
- nanostructures /
- transmission electron microscopy

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