1. Charles University, Faculty of Mathematics and Physics, Department of Surface and Plasma Science V Holešovičkách 2, 18000 Prague 8, Czech Republic
2. NIMS Beamline Station at SPring-8, National Institute for Materials Science, Sayo, Hyogo 679-5148, Japan
3. Institute of Chemical Technology Prague, Deparment of Inorganic Chemistry, Technická 5, 166 28 Prague 6, Czech Republic
4. Charles University, Faculty of Mathematics and Physics, Department of Condensed Matter Physics, Ke Karlovu 5, 121 16 Praha 2, Czech Republic
5. Ecomaterials Center, National Institute for Material Science, Namiki, Tsukuba, 305-0044, Japan
6. ICB - Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 5209 CNRS, Université de Bourgogne, 21078 Dijon CEDEX, France