1. Department of Polymer Chemistry and Technology, Faculty of Chemical Technology, Kaunas University of Technology, Barsausko st. 59, LT-51423, Kaunas, Lithuania
2. Department of Physics, Faculty of Mathematics and Natural Science, Kaunas University of Technology, Studentu st. 50, LT-51368, Kaunas, Lithuania
3. Department of Electronic Engineering, Lviv Polytechnic National University, Stepan Bandera st. 12, 79013, Lviv, Ukraine
4. Department of Organic Chemistry, Faculty of Chemistry, Yerevan State University, A. Manoogian 1, Yerevan 0025, Armenia