1. a Electrotechnical Institute, Division of Electrotechnology and Materials Science , M. Sklodowskiej-Curie 55/61 Street, 50-369, Wroclaw, Poland
2. b Centre of Polymer and Carbon Materials, Polish Academy of Sciences , 34 M. Curie-Sklodowska Street, 41-819, Zabrze, Poland
3. c Laboratoire d'Electronique Moléculaire, Organique et Hybride, UMR5819-SPrAM (CEA-CNRS-Univ. J. FOURIER-Grenoble I), INAC Institut Nanosciences and Cryogénie, CEA-Grenoble , 17 Rue des Martyrs, 38054, Grenoble Cedex 9, France