1. Istituto Italiano di Tecnologia; Graphene Labs; I-16163 Genova Italy
2. Technological Educational Institute (TEI) of Crete; Center of Materials Technology and Photonics and Electrical Engineering Department; Estavromenos 1939 Heraklion GR-71 004 Crete Greece
3. Istituto Italiano di Tecnologia; CompuNet; I-16163 Genova Italy
4. PSL Research University; Chimie ParisTech-CNRS; Institut de Recherche de Chimie Paris; F-75005 Paris France
5. Institut Universitaire de France; 103 Bd Saint-Michel F-75005 Paris France
6. Center for Nanotechnology Innovation@NEST; Istituto Italiano di Tecnologia; I-56127 Pisa Italy
7. Institute of Electronic Structure and Laser (IESL); Foundation of Research and Technology Hellas (FORTH); Heraklion Crete Greece