1. Institute of Atomic Physics and Spectroscopy, University of Latvia, Jelgavas 3, LV-1004 Riga, Latvia
2. Sumy State University, Center for Collective Use of Research Equipment, 31 Sanatorna Street, 40000 Sumy, Ukraine
3. NanoBioMedical Centre, Adam Mickiewicz University in Poznan, Wszechnicy Piastowskiej str. 3, 61-614 Poznan, Poland
4. Institut Européen des Membranes, IEM, UMR 5635, ENSCM, CNRS, Univ Montpellier, Montpellier, France