Journal
MICROSCOPY RESEARCH AND TECHNIQUE
Volume 85, Issue 9, Pages 3056-3068Publisher
WILEY
DOI: 10.1002/jemt.24165
Keywords
atomic force microscopy (AFM); multifractal analysis; NiO thin films; RF-sputtering; surface morphology
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Fractal and multifractal analysis was performed on atomic force microscopy (AFM) images of nickel oxide thin films deposited at different thicknesses. The results showed that the surface of the films exhibited multifractal behavior, with the level of multifractality and complexity decreasing with increasing thickness. Statistical parameters were also used to study the effects of layer thickness on the deposited NiO thin films, showing that these parameters varied with thickness.
Fractal and multifractal are the most important processes and concepts in describing and examining surface morphology, and for this reason, these concepts are an important approach for analyzing the properties and surface geometry of thin films. In this article, multifractal analysis was performed on images, prepared using atomic force microscopy (AFM), of the surface morphology of nickel oxide thin films deposited by RF-Magnetron sputtering at different thicknesses on the glass substrate. The effect of thickness on the surface properties of the layers was studied by applying multifractal and statistical methods on AFM images. The results obtained from the multifractal spectrum show that the surface of the nickel oxide thin films deposited at different thicknesses are multifractal. The multifractal analysis demonstrated that multifractality and complexity of the surface of nickel oxide thin films changes and decrease with thicknesses. We also used statistical parameters to better examine AFM images to study the effects of layers thickness on the deposited NiO thin films. The results indicated that the statistical parameters are a function of the layer's thickness of NiO thin films. Hence, the isotropic properties and functional parameters changed with changing surface thickness.
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