1. Department of Energy Conversion and Storage, Technical University of Denmark, Fysikvej, Building 310, DK-2800 Kgs. Lyngby, Denmark
2. Department of Physics, Technical University of Denmark, Fysikvej, Building 307, DK-2800 Kgs. Lyngby, Denmark
3. CAPRES—a KLA company, Diplomvej 373, 2800 Kgs. Lyngby, Denmark
4. Department of Chemistry, Aarhus University, Langelandsgade 140, DK-8000 Aarhus C, Denmark
5. National Centre for Nano Fabrication and Characterization, DTU Nanolab, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark