1. Laboratory for Multifunctional
Materials, ETH Zurich, Vladimir-Prelog-Weg 5, 8093 Zurich, Switzerland
2. Center for Hybrid Nanostructures and Institute of Nanostructure and
Solid State Physics, University of Hamburg, Luruper Chaussee 149, 22607 Hamburg, Germany
3. Ecole Polytechnique Fédérale de Lausanne, LMTS, Rue de la Maladière
71b, 2002 Neuchâtel, Switzerland
4. Department of Chemistry and Biomolecular
Science and Center for Advanced Materials Processing, Clarkson University, Potsdam, New York 13699, United States