1. Institute of Physics of Materials, Czech Academy of Sciences, Brno, Czech Republic, EU, pizurova@ipm.cz, kavciakova@ipm.cz, kubena@ipm.cz, bursik@ipm.cz
2. Department of Bioanalytical Instrumentation, Institute of Analytical Chemistry, Czech Academy of Sciences, Brno, Czech Republic, EU, hlavacek@iach.cz
3. CEITEC - Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic; EU, roupcova@ipm.cz
4. Institute of Electrophysics Ural Branch RAS, Yekaterinburg, Russia
5. Ural Federal University, Yekaterinburg, Russia; sokovnin@iep.uran.ru