1. Leibniz Institute for Solid State and Materials Research (IFW Dresden), Helmholtzstraße 20, 01069 Dresden, Germany
2. Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
3. The Division of Synchrotron Radiation Research, Lund University, SE-22100 Lund, Sweden
4. NanoLund, Lund University, Box 118, 22100 Lund, Sweden
5. Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA
6. Physik-Institut der Universität Zürich, Winterthurerstr. 190, CH-8057 Zürich, Switzerland