1. Laboratory for High Performance Ceramics, Empa. Swiss Federal Laboratories for Materials Science and Technology, CH-8600 Dübendorf, Switzerland
2. Department of Chemistry, University of Basel, CH-4056 Basel, Switzerland
3. Electron Microscopy Center, Empa. Swiss Federal Laboratories for Materials Science and Technology, CH-8600 Dübendorf, Switzerland
4. Laboratory for Advanced Fibers, Empa. Swiss Federal Laboratories for Materials Science and Technology, CH-9014 St. Gallen, Switzerland
5. Technische Universität Bergakademie Freiberg, D-09596 Freiberg, Germany