1. Institute
for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany
2. Laboratory
for Electron Microscopy, Karlsruhe Institute of Technology (KIT), 76128 Karlsruhe, Germany
3. Institute
for Technical Thermodynamics and Refrigeration, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany