1. Faculty of Physics, Astronomy and Informatics, Institute of Physics, Nicolaus Copernicus University in Toruń, Toruń, Poland
2. Institute for Microelectronics and Microsystems (CNR-IMM), Campus Unisalento, Lecce, Italy
3. Center for Biomolecular Nanotechnologies @UNILE, Istituto Italiano di Tecnologia, Arnesano, Italy