1. Institute of Chemistry, University of Silesia in Katowice, Szkolna 9, 40-006 Katowice, Poland
2. August Chełkowski Institute of Physics, University of Silesia in Katowice, 75 Pułku Piechoty 1a, 41- 500 Chorzów, Poland
3. Institute of Materials Engineering, University of Silesia in Katowice, 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland