1. Department of Materials and Interfaces, Weizmann Institute of Science, 76100 Rehovot, Israel
2. ESRF - The European Synchrotron, 71 Avenues des Martyrs, 38000 Grenoble, France
3. Department of Chemical Research Support, Weizmann Institute of Science, 76100 Rehovot, Israel
4. Department of Physics of Complex Systems, Weizmann Institute of Science, 76100 Rehovot, Israel