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Diffusion of Palladium on Tantalum Microcrystal

100%
Antczak G., Błaszczyszyn R.
Acta Physica Polonica A
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2003
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vol. 103
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issue 1
57-65
EN
Surface diffusion of palladium,Θ=2 ML, on a tantalum microcrystal was studied by means of field electron emission microscopy within the temperature range 665-790 K. The observed sharp moving boundary-diffusion proceeds with an activation energy ranging from 1.25 to 1.7 eV/atom, depending on the crystallographic direction.
2
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Surface Self-Diffusion of Iridium: Field Electron Emission Study

81%
Antczak G., Błaszczyszyn M., Błaszczyszyn R.
Acta Physica Polonica A
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2000
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vol. 98
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issue 4
383-388
EN
The self-diffusion of iridium was studied by means of field electron microscopy. The measurements, based on the well-known process of surface build-up, were carried out under the UHV conditions within the temperature range of 790-935K. The activation energy for the diffusion was determined to be equal to 2.10±0.10eV/atom (48.4±2.3kcal/mol). This value is compared with activation energies for self-diffusion on other metal surfaces, as well as with those for self-diffusion of single iridium atoms and clusters on iridium, known from the field ion microscopy measurements.
3
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X-Ray Fluorescence Techniques in Medical Applications: Reference Values of Elements in Human Serum, Urine and Hair

52%
Majewska U., Banaś D., Braziewicz J., Kubala-Kukuś A., Pajek M., Sychowska I., Wudarczyk-Moćko J., Antczak G., Borkowska B., Góźdź S.
Acta Physica Polonica A
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2014
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vol. 125
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issue 4
864-868
EN
The aim of undertaken long-term studies of the elemental composition of human serum, urine, and hair is to define reference values of elements concentration. For this purpose the total reflection X-ray fluorescence method was applied to determination of several elements concentration in human serum, urine and hair (S, K, Ca, Fe, Cu, Zn, Br, P, Cr, and Rb in serum samples; Fe, Cu, Zn, Rb, Cr, Mn, and Sr in urine samples; S, K, Ca, Fe, Cu, Br, Zn, Cl, Ti, Cr, Mn, Ni, and Se in hair samples) in the range of concentration from ppb to several hundred ppm. The method of selection of the control group, the experimental setup and its calibration procedure are described. We also present sample preparation methods and procedure of measurements.
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