1. National
Nanotechnology Laboratory (NNL), Istituto Nanoscienze-CNR, Via
per Arnesano 16, I-73100 Lecce, Italy
2. Center for Biomolecular Nanotechnologies @UNILE, Istituto Italiano di Tecnologia, Via Barsanti, I-73010 Arnesano, Italy
3. Laboratoire
Structures, Propriétés et Modélisation des Solides,
CNRS UMR 8580, École Centrale Paris, Grand Voie des Vignes, F-92295 Châtenay-Malabry, France