1. Budapest University of Technology and Economics, Department of Physical Chemistry and Materials Science, Centre for Colloid Chemistry, H-1521 Budapest, Hungary
2. Research Institute for Technical Physics and Material Science, Hungarian Academy of Sciences, Ceramics and Nanocomposites Department, H-1525 Budapest, Hungary
3. Department of Anatomy, Cell and Developmental Biology, Cell Physiology Laboratory, Loránd Eötvös University, P.O. Box 120, 1518 Budapest, Hungary