BiointerfaceGroup, Laboratory for Surface Science and Technology, Department of Materials, Swiss Federal Institute of Technology (ETH) Zürich, CH-8093 Zurich, Switzerland, Laboratory for Micro- and Nanotechnology, Paul Scherrer Institut (PSI), CH-5232 Villigen, Switzerland, Department of Chemical and Biosystems Science and Technologies, University of Siena, Via A. Moro, 2, 53100 Siena, Italy, and Centre Suisse d'Electronique et de Microtechnique (CSEM), Rue Jaquet-Droz 1, CH-2007 Neuchâtel, Switzerland(At 2004-09-21)
