A rotating sample cell for in situ measurements of adsorption with x-rays

Ramonna I Kosheleva; Athanasios T Varoutoglou; George A Bomis; George Z Kyzas; Evangelos P Favvas; Athanasios Ch Mitropoulos

doi:10.1063/1.5053860

A rotating sample cell for in situ measurements of adsorption with x-rays

Rev Sci Instrum. 2018 Dec;89(12):123113. doi: 10.1063/1.5053860.

Authors

Ramonna I Kosheleva¹, Athanasios T Varoutoglou¹, George A Bomis¹, George Z Kyzas¹, Evangelos P Favvas², Athanasios Ch Mitropoulos¹

Affiliations

¹ Hephaestus Laboratory, Department of Petroleum and Mechanical Engineering, Eastern Macedonia and Thrace Institute of Technology, St. Lucas, 654 04 Kavala, Greece.
² Membranes and Materials for Environmental Separations Laboratory, Institute of Nanoscience and Nanotechnology, NCSR "Demokritos" Ag. Paraskevi, Attica 153 41, Greece.

PMID: 30599600
DOI: 10.1063/1.5053860

Abstract

A sample cell which facilitates adsorption in conjunction with small angle x-ray scattering under a rotational field is presented. The device allows dynamic phenomena that take place within a pore system to be investigated in situ by x-rays. As an example, a sample of Vycor porous glass was measured at relative pressures p/p_o = 0 and p/p_o = 0.5. For the static measurements, the results were as expected. Under rotation, an increase in the scattered intensity of the loaded sample, over the corresponding static one, is observed. Fractal analysis has shown an increase in the fractal dimension even higher than that of the dry sample. It was suggested that the increase in the scattered intensity was due to the rotation, while the abnormality in the fractal dimension was due to asymmetric ripples of the adsorbed layers. The limits of the technique are given too.