1. Centre for Nanomaterial Research, Palacky University, Svobody 26, 771 46 Olomouc, Czech Republic, Institute of Geological Sciences, Masaryk University, Kotlášká 2, 611 37 Brno, Czech Republic, Department of Physical Chemistry, Palacky University, Svobody 26, 771 46 Olomouc, Czech Republic, Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Žižkova 22, 616 62 Brno, Czech Republic, and Technical University of Liberec, Research Center ARTEC, Hálkova 6, 461 17 Liberec, Czech Republic