1. Federal Institute for Materials Research and Testing; Berlin; Germany
2. Department of Experimental Molecular Imaging; RWTH Aachen University; Aachen; Germany
3. Chemical Process Engineering; RWTH Aachen University; Aachen; Germany
4. Applied Medical Engineering; Helmholtz-Institute, RWTH Aachen University; Germany
5. Elektronenmikroskopische Einrichtung; RWTH Aachen University; Aachen; Germany
6. Interdisciplinary Research Centre; K.U.Leuven-Campus Kortrijk; Kortrijk; Belgium