1. Department of Surface and Plasma Science Faculty of Mathematics and Physics Charles University V Holešovičkách 747/2, Prague 8 CZ‐180 00 Prague Czech Republic
2. Institute of Macromolecular Chemistry National Academy of Sciences of Ukraine Kharkivske Shosse 48 Kyiv 02160 Ukraine
3. Department of Geochemistry Institute of Rock Structure and Mechanics Czech Academy of Sciences V Holešovičkách 94/41, Prague 8 CZ‐182 09 Prague Czech Republic
4. Institute of Physics Faculty of Mathematics and Physics Charles University Ke Karlovu 2026/5, Prague 2 CZ‐121 16 Prague Czech Republic
5. Department of Macromolecular Physics Faculty of Mathematics and Physics Charles University V Holešovičkách 747/2, Prague 8 CZ‐180 00 Prague Czech Republic