1. Center of Materials and Nanotechnologies, Faculty of Chemical Technology, University of Pardubice, nam. Cs. Legii 565, Pardubice 530 02, Czech Republic
2. College of Physics, Hebei Normal University, Shijiazhuang 050024, China
3. Institute of Applied Physics and Mathematics, Faculty of Chemical Technology, University of Pardubice, Studentska 95, Pardubice 530 02, Czech Republic
4. Central European Institute of Technology, Brno University of Technology, Purkynova 123, 61200 Brno, Czech Republic
5. Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentska 573, 532 10 Pardubice, Czech Republic