1. Micro- and Nanostructured Materials Laboratory, Department of Energy, Politecnico di Milano, via Ponzio 34/3, 20133 Milano, Italy
2. OptMatLab, Dipartimento di Fisica, Università di Genova, via Dodecaneso 33, I-16146, Genova, Italy
3. Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, Delft, 2628 CJ, The Netherlands
4. Laboratory of Supramolecular and Bio-Nanomaterials, Department of Chemistry, Materials, and Chemical Engineering “Giulio Natta”, Politecnico di Milano, Via L. Mancinelli 7, 20133 Milano, Italy
5. Center for Nanoscience and Technology – IIT@Polimi, via Giovanni Pascoli 70/3, 20133, Milano, Italy
6. CNR-SPIN, C. so Perrone 24, 16152 Genova, Italy
7. Department of Physics, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
8. Laboratoire des Sciences des Procédés et des Matériaux (LSPM), CNRS, Université Sorbonne Paris Nord, 93430 Villetaneuse, France