1. Institute
of Physical Chemistry, University of Innsbruck, Innrain 80-82, A-6020 Innsbruck, Austria
2. Institute
of Materials Chemistry, Vienna University of Technology, Getreidemarkt
9/BC/01 A-1060 Vienna, Austria
3. Ernst
Ruska Zentrum und Peter Grünberg Institut, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
4. International
Iberian Nanotechnology Laboratory, Av. Mestre Jose Veiga s/n, 4715-330 Braga, Portugal
5. Institute
of Mineralogy and Petrography, University of Innsbruck, Innrain
52d, A-6020 Innsbruck, Austria