1. Faculty of Chemistry; Silesian University of Technology; Ks. M. Strzody 9 44-100 Gliwice Poland
2. Center of Polymer and Carbon Materials; Polish Academy of Science; M. Curie-Sklodowskiej 34 41-819 Zabrze Poland
3. Physics Department; Durham University; South Road Durham DH1 3LE UK
4. ARC Centre; University of Wollongong; Wollongong NSW 2522 Australia