1. Institute of Applied Physics and Center for Materials Research
2. Justus-Liebig-University
3. D-35392 Giessen
4. Germany
5. Institute of Physical Chemistry
6. Justus-Liebig-University Giessen
7. Department of Physics and Materials Science Centre
8. Philipps-University of Marburg
9. D-35032 Marburg
10. Department of Chemistry and Chemical Engineering
11. Faculty of Engineering, Yamagata University
12. Yonezawa
13. Japan