National University of Science and Technology Politehnica Bucharest, Roma Tre University, National University of Science and Technology Politehnica Bucharest, Polytechnic University of Bucharest, National University of Science and Technology Politehnica Bucharest, Chinese Academy of Sciences (CAS), Chinese Academy of Sciences (CAS), Polytechnic University of Bucharest, University of Bucharest, National University of Science and Technology Politehnica Bucharest, Università degli Studi Roma Tre, Roma Tre University, University of Bucharest, Chinese Academy of Sciences (CAS) - Ningbo Institute of Materials Technology and Engineering and University POLITEHNICA of Bucharest - Center for Microscopy-Microanalysis and Information Processing