1. Center
for Individual Nanoparticle Functionality, Department of Physics, Technical University of Denmark, Kgs Lyngby, Denmark
2. Department
of Energy Conversion and Storage, Technical University of Denmark, Roskilde, Denmark
3. Department
of Physics, Norwegian University of Science and Technology, Trondheim, Norway
4. Physical
Biology Center for Ultrafast Science and Technology, Arthur Amos Noyes
Laboratory of Chemical Physics, California Institute of Technology, Pasadena, California 91125, United States
5. Haldor Topsøe
A/S, Kgs Lyngby, Denmark