1Josip Juraj Strossmayer University of Osijek, Department of Chemistry, Osijek, Croatia 2University of Zagreb, Faculty of Science, Department of Physics, Zagreb, Croatia 3Ruđer Bošković Institute, Center of Excellence for Advanced Materials and Sensing Devices, Zagreb, Croatia 4University of Ljubljana, Faculty of Civil and Geodetic Engineering, Ljubljana, Slovenia 5Institute of Mathematics, Physics & Mechanics, Ljubljana, Slovenia 6Justus Liebig University Giessen, Physical Chemistry Institute, Giessen, Germany 7Technische Universität Braunschweig, Institute for Particle Technology and Laboratory for Emerging Nanometrology, Braunschweig, Germany