1. Institute of Optoelectronics, Military University of Technology, 2 Gen. Sylwestra Kaliskiego Str., 00-908 Warsaw, Poland
2. Department of Chemistry, University of Helsinki, P.O. Box 55, FI-00014 Helsinki, Finland
3. Institute of Materials Science and Engineering, Faculty of Advanced Technologies and Chemistry, Military University of Technology, 2 Gen. Sylwestra Kaliskiego Str., 00-908 Warsaw, Poland