1. IOM CNR Laboratorio TASC, 34149 Basovizza, TS, Italy
2. Freie Universität Berlin, Department of Physics Arnimallee 14, 14195 Berlin-Dahlem, Germany
3. Uppsala University, Department of Chemisty Ångström, P.O. Box 523, 75120 Uppsala, Sweden
4. Institute for Solar Fuels, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner-Platz 1, 14109 Berlin, Germany
5. Università degli Studi di Trieste, Physics Department, P.le Europa 1, 34127 Trieste, Italy
6. Elettra-Sincrotrone Trieste, Area Science Park, 34149 Basovizza, Trieste, Italy
7. Department of Physics, University of Johannesburg, P.O. Box 524, Auckland Park, Johannesburg 2006, South Africa