1. Laboratory Materials for Energy Conversion; Empa, Swiss Federal Laboratories for Materials Science and Technology; Überlandstrasse 129 Dübendorf Switzerland
2. Institute of Non-Metallic Materials; Clausthal University of Technology; Zehntnerstrasse 2a 38678 Clausthal-Zellerfeld Germany
3. Institute for Material Science; University of Stuttgart; Heisenbergstraße 3 70569 Stuttgart Germany