1. The Institute of Chemistry and Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
2. Department of Chemistry, University of California and Lawrence Berkeley National Laboratory, Berkeley, California 94720-1460, United States
3. IFN-CNR, Dipartimento di Fisica, Politecnico di Milano, Milan 20133, Italy
4. The Sackler Institute for Computational Molecular and Materials Science, Tel Aviv University, Tel Aviv, Israel 69978