Institution: | a3Nano-SAE Research Centre, University of Bucharest, Faculty of Physics, 77125 Bucharest, Magurele MG-38, Romania;bUniversity of Agriculture Sciences and Veterinary Medicine, 59 Marasti, Bucharest, Romania;cNational Institute for Lasers, Plasma and Radiation Physics, P.O. Box MG-36, 77125 Bucharest, Magurele, Romania |