1. Institute of Chemistry and Biochemistry, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany
2. Research Center of Electron Microscopy, Freie Universität Berlin, Fabeckstr. 36A, 14195 Berlin, Germany
3. Research Building SupraFAB, Freie Universität Berlin, Altensteinstr. 23a, 14195 Berlin, Germany