1. Laboratory for Chemistry of Novel Materials, Materials Research Institute, University of Mons, Place du Parc 20, B-7000 Mons, Belgium
2. Institute of Electronics, Microelectronics and Nanotechnology, University of Lille, Avenue Poincaré CS 60069, F-59652 Villeneuve d’Ascq Cedex, France
3. Materia Nova R&D Center, Avenue Nicolas Copernic 3, B-7000 Mons, Belgium