1. Dipartimento di Fisica, Università degli Studi di Trieste, via A. Valerio 2, 34127 Trieste, Italy
2. Peter Grünberg Institute (PGI-6), Forschungszentrum Jülich GmbH, Leo-Brandt-Straße, 52428 Jülich, Germany
3. Elettra-Sincrotrone, S.C.p.A, S.S 14 – km 163.5, 34149 Trieste, Italy
4. Dipartimento di Scienze Chimiche, Università degli Studi di Padova, via F. Marzolo 1, 35131 Padova, Italy
5. Institute of Condensed Matter Chemistry and Technologies for Energy (ICMATE), National Research Council (CNR), c/o Department of Chemistry, University of Padova, via F. Marzolo 1, 35131 Padova, Italy
6. Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
7. CNR-IOM, Lab. TASC, s.s. 14 km 163,5, 34149 Trieste, Italy
8. Fakultät f. Physik and Center for Nanointegration Duisburg-Essen (CENIDE), Universität Duisburg-Essen, D-47048 Duisburg, Germany
9. Department of Physics and Astronomy, UC Davis, Davis, CA 95616, USA