1. Department of Chemistry and Chemical Engineering
2. Chalmers University of Technology
3. SE-412 96 Göteborg
4. Sweden
5. Luminescent Materials Laboratory
6. Department of Biotechnology
7. University of Verona, and INSTM
8. UdR Verona
9. 371 34 Verona
10. Department of Microtechnology and Nanoscience
11. 412 96 Göteborg