Studies of physico-chemical properties and fractal dimensions of selected high-temperature superconductor surfaces |
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| Authors: | G W Chądzyński P Staszczuk D Sternik M Błachnio |
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| Institution: | 1. Institute of Physics, Faculty of Fundamental Problems of Technology, Wroc?aw University of Technology, Wybrze?e Wyspia?skiego Str.27, 50-370, Wroc?aw, Poland
2. Department of Physicochemistry of Solids Surface, Chemistry Faculty, Maria Curie-Sk ?odowska University, M. Curie-Sk?odowska Sq. 3, 20-031, Lublin, Poland
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| Abstract: | Properties relating to porosity of solids (fractal dimensions, surface roughness parameters) were evaluated from atomic force
microscopy (AFM) and nitrogen adsorption-desorption isotherms measured at 77 K for selected high-temperature (RE) Ba2Cu3O7−x, RE=Y, Sm] superconductors. Adsorption capacity, specific surface area, fractal dimensions were determined from adsorption-desorption
isotherms. The adsorption isotherms of all samples were S-shaped and belong to type II according to the IUPAC classification.
A linear relationship was demonstrated between the fractal coefficients calculated by using the two methods and values of
adsorption capacity of monolayer. |
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| Keywords: | adsorption-desorption isotherms atomic force microscopy fractal dimensions high-temperature superconductors surface roughness parameters |
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