1. Department
of Physics, University of Durham, South Road, Durham DH1 3LE, United Kingdom
2. Faculty
of Chemistry, Silesian University of Technology, M. Strzody 9, 44-100 Gliwice, Poland
3. Center
of Polymer and Carbon Materials, Polish Academy of Sciences, M. Sklodowskiej-Curie 34, 41-819 Zabrze, Poland
4. Faculty
of Chemistry, Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland