1. Institute
of Advanced Ceramics, Hamburg University of Technology, Denickestrasse
15, 21073 Hamburg, Germany
2. Institute
of Optical and Electronic Materials, Hamburg University of Technology, Eissendorfer Strasse 38, 21073 Hamburg, Germany
3. Institute
of Thermal Separation Processes, Hamburg University of Technology, Eissendorfer Strasse 38, 21073 Hamburg, Germany
4. Institute
of Physical Chemistry, University of Hamburg, Grindelallee 117, 20146 Hamburg, Germany