1. National Nanotechnology Laboratory for Agribusiness (LNNA), Embrapa Instrumentação, São Carlos-SP 13560-970, Brazil
2. Institute of Biomedical Engineering, Dept. of Cell Biology, RWTH Aachen University, Pauwelsstraße, 30, Aachen D-52074, Germany
3. DWI-Leibniz-Institute for Interactive Materials, RWTH Aachen University, Forckenbeckstraße 50, Aachen D-52074, Germany
4. Institute for Pathology, Electron Microscopy Facility, RWTH Aachen University, Pauwelsstraße, 30, Aachen D-52074, Germany
5. Klinik für Kinder- und Jugendmedizin, RWTH Aachen University, Pauwelsstraße, 30, Aachen D-52074, Germany