1. nanotech@surfaces Laboratory, Empa − Swiss Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
2. Faculty of Chemistry and Food Chemistry, and Center for Advancing Electronics Dresden, Technical University of Dresden, 01069 Dresden, Germany
3. Department of Synthetic Chemistry, Max Planck Institute for Polymer Research, 55021 Mainz, Germany
4. Department of Chemistry and Biochemistry, University of Bern, 3012 Bern, Switzerland