1. Transport at Nanoscale Interfaces Laboratory, Empa, Swiss Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
2. Department of Physics, University of Basel, 4056 Basel, Switzerland
3. nanotech@surfaces Laboratory, Empa, Swiss Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
4. Department of Information Technology and Electrical Engineering, ETH Zurich, 8092 Zurich, Switzerland
5. IBM Research − Zurich, 8803 Rüschlikon, Switzerland
6. Max Planck Institute for Polymer Research, 55128 Mainz, Germany
7. Quantum Center, ETH Zürich, 8093 Zürich, Switzerland
8. Research Center for Electronic and Optical Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
9. Research Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
10. Department of Chemistry, Biochemistry and Pharmaceutical Science, University of Bern, 3012 Bern, Switzerland
11. Swiss Nanoscience Institute, University of Basel, 4056 Basel, Switzerland