1. a Department of Organic Technology, Kaunas University of Technology, Radvilenu plentas 19, LT50254, Kaunas, Lithuania
2. b Department of Organic Technology, Kaunas University of Technology, Radvilenu plentas 19, LT50254, Kaunas, Lithuania
3. c Department of Organic Technology, Kaunas University of Technology, Radvilenu plentas 19, LT50254, Kaunas, Lithuania
4. d Department of Solid State Electronics, Vilnius University, Sauletekio aleja 9, LT10222, Vilnius, Lithuania