Abstract

A hierarchical nickel oxide film was grown on the surface of a polycrystalline Al₂O₃ substrate by hydrothermal synthesis. The microstructure of the obtained coating was studied by scanning electron microscopy and atomic force microscopy, which showed that this coating comprises porous nanosheets (about 7 nm thick) arranged at various angles to each other and to the surface of the substrate. The lateral sizes of these nanosheets were in the range 3–5 μm. The local electrophysical characteristics of the obtained oxide coating were investigated by scanning capacitance microscopy and Kelvin probe force microscopy; using the obtained results, the maps of the distributions of the surface potential and capacitance contrast over the surface of the NiO film were constructed, and the work function of the surface of this film was calculated.

中文翻译：

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水热条件下在Al 2 O 3基体表面形成分层NiO涂层

摘要

在多晶Al ₂ O ₃的表面上生长分层的氧化镍膜通过水热合成得到底物。通过扫描电子显微镜和原子力显微镜对获得的涂层的微观结构进行了研究，结果表明该涂层包含多孔纳米片（约7 nm厚），它们以彼此之间以及相对于基材表面的不同角度排列。这些纳米片的横向尺寸在3-5μm的范围内。用扫描电容显微镜和开尔文探针力显微镜研究所得氧化物涂层的局部电物理特性。利用所获得的结果，构建了NiO膜表面上的表面电势和电容对比度的分布图，并且计算了该膜表面的功函数。