1. Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA and Department of Physics, University of California, Berkeley, California 94720, USA
2. Department of Chemistry, University of California, Berkeley, California 94720, USA
3. Service de Recherches de Métallurgie Physique, CEA, DEN, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
4. Kavli Energy Nanosciences Institute at Berkeley, Berkeley, California 94720, USA