1. Electron Microscopy Laboratory; University of Environmental and Life Sciences Wroclaw; ul. Kożuchowska 5B 50-631 Wrocław Poland
2. Wroclaw Research Centre EIT+; ul. Stabłowicka 147 54-066 Wroclaw Poland
3. Institute of Materials Science and Applied Mechanics, Wrocław University of Technology; ul. Smoluchowskiego 25 50-370 Wroclaw Poland