期刊
PHYSICS LETTERS A
卷 378, 期 34, 页码 2533-2538出版社
ELSEVIER
DOI: 10.1016/j.physleta.2014.06.033
关键词
Nanostructure; Helium plasma; Fractality; Fractal dimension
资金
- Japan Society for the Promotion of Science (JSPS) [23686133]
- NIFS/NINS under the project of Formation of International Scientific Base and Network
- Grants-in-Aid for Scientific Research [23686133] Funding Source: KAKEN
Fractal property of the helium irradiated nanostructured tungsten was investigated from the scanning electron microscope (SEM) micrographs, gas adsorption isotherms, and transmission electron microscope (TEM) micrographs. From the SEM micrographs, fractal dimension and the parameter d(min), which characterizes the SEM texture image, were deduced, and the fractal dimension was compared with the one obtained from the gas adsorption isotherms. It was revealed that the fractal dimension obtained from the top view SEM micrographs was significantly lower than that from the adsorption isotherms. From the cross sectional SEM micrographs, two power law relations were identified in two different scales, and the fractal dimension from the adsorption was in between the two fractal dimensions. From the TEM micrographs, it was found that the porosity distribution also has fractal relation with height of the nanostructures when the nanostructures were sufficiently grown. (C) 2014 Elsevier B.V. All rights reserved.
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