1. Drohobych Ivan Franko State Pedagogical University; 82100 Drohobych Ukraine
2. The John Paul II Catholic University of Lublin; 20-950 Lublin Poland
3. Institute of Cell Biology, National Academy of Sciences of Ukraine; 79005 Lviv Ukraine
4. Institute of Physics, Slovak Academy of Sciences; 84511 Bratislava Slovak Republic
5. Institute of Electrochemistry and Energy Systems, Bulgarian Academy of Sciences; 1113 Sofia Bulgaria
6. Thin Films Technology Laboratory, University of Chemical Technology and Metallurgy; 1756 Sofia Bulgaria
7. Kazan Physical-Technical Institute, Russian Academy of Sciences; 420029 Kazan Russian Federation