Affiliation: | 1. Jacobs University, School of Engineering and Science, Postfach 750561, 28725 Bremen (Germany), Fax: (+49)?421‐200‐3229 http://www.jacobs‐university.de/ses/ukortz;2. Permanent address: Nikolaev Institute of Inorganic Chemistry, Novosibirsk (Russia);3. Institute of Fundamental Sciences, Massey University, Palmerston North (New Zealand);4. Institut für Nanotechnologie, Karlsruhe Institut für Technologie (KIT) (Germany) |