Affiliation: | a Institute of Electrochemistry and Energy Systems, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 10, 1113 Sofia, Bulgaria b Thin Films Technology Laboratory, Physics Department, University of Chemical Technology and Metallurgy, 8 Kl. Ohridsky Boulevard, 1756 Sofia, Bulgaria c Laser-Surface-Plasma Interactions Laboratory, Lasers Department, National Institute for Lasers, Plasma and Radiations Physics, PO Box MG-54, Bucharest-Magurele, RO-77125, Romania d Institute of Nanostructure Technologies and Analytics (INA), University of Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany |