1. IOM-CNR, Laboratorio TASC, S.S. 14 - km 163.5, 34149 Basovizza, Trieste, Italy
2. University of Trieste, Graduate School of Nanotechnology, Piazzale Europa 1, 34127 Trieste, Italy
3. Inorganic Chemistry
and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, Utrecht, Netherlands
4. Department of Physics, Bilkent University, 06800 Ankara, Turkey
5. Department of Physics, University of Johannesburg, P.O. Box 524, Auckland Park, 2006 Johannesburg, South Africa