1. Laboratoire de Génie Electrique de Paris (LGEP, UMR 8507 CNRS), LGEP-Supélec, Universités Paris VI and Paris XI; Plateau de Moulon, 11 rue Joliot Curie, 91192 Gif-sur-Yvette France
2. Laboratoire de Physique des Interfaces et des Couches Minces (LPICM, UMR 7647 CNRS), Ecole Polytechnique; 91128 Palaiseau France
3. Department of Graphic Arts and Photophysics; Faculty of Chemical Technology, University of Pardubice; Studentská 95, 532 10 Pardubice Czech Republic
4. Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic; Heyrovský Sq. 2, 162 06 Prague 6 Czech Republic
5. Laboratoire d'Innovation en Chimie des Surfaces et Nanosciences, CEA Saclay, DSM/IRAMIS; 91191 Gif-sur-Yvette France