1. Sol-Gel Centre for Research on Inorganic Powders and Thin Film Synthesis; SCRiPTS; Ghent University; Krijgslaan 281 S3 9000 Gent Belgium
2. Institut de Ciència de Materials de Barcelona; ICMAB - CSIC; Campus UA Barcelona; E-08193 Bellaterra Catalonia Spain
3. Electron Microscopy for Materials Science; EMAT; University of Antwerp; Groenenborgerlaan 171 2020 Antwerp Belgium