1. Department
of Materials, Polymer Physics, ETH Zurich, Leopold-Ruzicka-Weg 4, HCP F 45.2, CH-8093 Zurich, Switzerland
2. Department of Chemical Engineering, University of Patras & FORTH-ICE/HT, Patras, GR26504, Greece
3. Department
of Mechanical and Process Engineering, Particle Technology Laboratory,
Institute of Process Engineering, ETH Zurich, Sonneggstrasse 3, CH-8092 Zürich, Switzerland