The network structure of a silica bilayer film at a monolayer-bilayer transition and across a supporting metal step edge was studied at the atomic scale by scanning tunneling microscopy. The ring size distribution, ring-ring distances, and height profiles are analyzed across the step edge region. Density functional theory proposes two models to explain the observed network structure: a pinning of the lower layer to the substrate and a carpetlike mode. The results indicate a continuous coverage of the silica bilayer film across the step edge.

中文翻译：

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跨越支撑金属台阶边缘的二维二氧化硅的连续网络结构：原子尺度研究

通过扫描隧道显微镜在原子尺度上研究了单层-双层过渡处和支撑金属台阶边缘的二氧化硅双层膜的网络结构。跨台阶边缘区域分析环尺寸分布、环-环距离和高度轮廓。密度泛函理论提出了两个模型来解释观察到的网络结构：下层固定到基材和地毯状模式。结果表明二氧化硅双层膜跨越台阶边缘连续覆盖。