1. Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, USA
2. John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford Street, Cambridge, Massachusetts 02138, USA
3. Department of Engineering, University of Rome “Roma Tre,” Via della Vasca Navale 79, 00143 Rome, Italy
4. Istituto per le Applicazioni del Calcolo - CNR, CNR, Via dei Taurini 19, 00185 Rome, Italy
5. Department of Enterprise Engineering “Mario Lucertini,” University of Rome “Tor Vergata,” Via del Politecnico 1, 00133 Rome, Italy
6. Center for Nanoscale Systems, 11 Oxford Street, Cambridge, Massachusetts 02138, USA
7. Department of Physics, Harvard University, 17 Oxford Street, Cambridge, Massachusetts 02138, USA