1. Helmholtz Institute Ulm (HIU); Helmholtzstrasse 11 89081 Ulm Germany
2. Institute of Nanotechnology; Karlsruhe Institute of Technology (KIT); P.O. Box 3640 76021 Karlsruhe Germany
3. Institute of Surface Chemistry and Catalysis; Ulm University; Albert-Einstein-Allee 47 89081 Ulm Germany
4. Karlsruhe Nano-Micro Facility (KNMF); Karlsruhe Institute of Technology (KIT); Germany
5. Institute of Electrochemistry; Ulm University; Ulm Germany
6. Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS); CNRS-Université de Strasbourg; France