1. Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9/V, 8010 Graz, Austria
2. Center of Excellence for Nanostructured Materials (CENMAT) and INSTM, Unit of Trieste, Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, 34127 Trieste, Italy
3. Elettra-Sincrotrone Trieste, Strada Statale 14, km 163.5 in AREA Science Park, 34149 Basovizza, Trieste, Italy
4. University of Trieste, Chemical and Pharmaceutical Sciences Department, Via L. Giorgieri 1, 34127 Trieste, Italy
5. Istituto Officina dei Materiali, IOM−CNR, SS. 14 km 163.5 in Area Science Park, 34149 Basovizza,
Italy, and Department of Physics, University of Trieste, 34128 Trieste, Italy
6. Institute for Electron Microscopy & Nanoanalysis and Center for Electron Microscopy, Graz University of Technology, NAWI Graz, Steyrergasse 17, 8010 Graz, Austria
7. Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 180 00 Praha 8, Czech Republic
8. Institute for Chemistry and Technology of Materials, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
9. Carbon Nanobiotechnology Laboratory CIC biomaGUNE, Paseo de Miramón, 18220009 Donostia-San Sebastian, Spain
10. Basque Foudation for Science, Ikerbasque, Bilbao 48013, Spain