Affiliation: | 1. Molecular Nanofabrication Group, MESA+ Institute for Nanotechnology, University of Twente, 7500 AE, Enschede (The Netherlands), Fax: (+31)?53‐489‐4645 http://mnf.tnw.utwente.nl;2. Materials Science and Technology of Polymers Group, University of Twente (The Netherlands);3. Present address: Institut für Physikalische Chemie, Universit?t Siegen (Germany) |