1. University of Silesia, Institute of Material Science, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland
2. University of Silesia, Institute of Chemistry, Szkolna 9, 40-006 Katowice, Poland
3. University of Silesia, Institute of Physics, Uniwersytecka 4, 40-007 Katowice, Poland