1. Institute of Materials Science, NCSR “Demokritos”, Agia Paraskevi 15310 Athens, Greece, Department of Food Technology, Technological Educational Institution of Athens, Agiou Spyridonos Street, 122 10 Egaleo, Athens, Greece, and Department of Physical Chemistry and Nanomaterials Research Centre, Palacky University, Svobody 26, 77146 Olomouc, Czech Republic