1. Nanoparticle Systems Engineering Laboratory, Institute of Energy and Process Engineering (IEPE), Department of Mechanical and Process Engineering (D-MAVT), ETH Zurich, Sonneggstrasse 3, 8092 Zurich, Switzerland
2. Particles-Biology Interactions, Department of Materials Meet Life, Swiss Federal Laboratories for Materials Science and Technology (Empa), Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland
3. Particle Technology Laboratory, Institute of Energy and Process Engineering (IEPE), Department of Mechanical and Process Engineering (D-MAVT), ETH Zurich, Sonneggstrasse 3, CH-8092 Zurich, Switzerland
4. Department of Radiation Oncology, Cantonal Hospital St. Gallen (KSSG), Rohrschacherstrasse 95, CH-9007 St. Gallen, Switzerland
5. University of Bern, Freiburgstr. 18, CH-3010 Bern, Switzerland