Affiliation: | 1. CEA, Laboratoire d'Electronique Moléculaire, IRAMIS/SPEC, 91191 Gif sur Yvette cedex (France), Fax: (+33)?1‐6908‐6640 http://iramis.cea.fr/spec/lem;2. Present address: Institute of Physics, Pregrevica 118, 11080 Belgrade (Serbia);3. Institute for Materials Science and Max Bergmann Center of Biomaterials, Dresden University of Technology, 01062 Dresden, (Germany) |