1. International Centre of Electron Microscopy for Materials Science and Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, 30-059 Krakow, Poland
2. Polish Academy of Sciences, Institute of Fundamental Technological Research, 02-106 Warszawa, Poland
3. Department of Materials Science and Metallurgy, University of Cambridge, CB3 0FS Cambridge, U.K.
4. Nanoscience Institute NANO, Italian National Research Council (CNR), 56127 Pisa, Italy
5. Academic Centre for Materials and Nanotechnology, AGH University of Science and Technology, 30-059 Krakow, Poland
6. Department of Physics, University of Pisa, 56127 Pisa, Italy
7. Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, 30-059 Krakow, Poland