1 Institute of Chemical Engineering and High Temperature Chemical Processes-Patras, FORTH, 26500 Patras, Greece 2 Institute of Food Technology, Faculty of Agriculture, University of Belgrade, 11080 Belgrade, Serbia 3 Institute of Theoretical Chemistry, Ulm University, 89081 Ulm, Germany 4Department of Material Science and Engineering and Canadian Centre for Electron Microscopy, McMaster University, Hamilton ON, Canada L8S4M1