1. Catalonia Institute for Energy Research—IREC, Sant Adrià de Besòs 08930, Barcelona, Spain
2. LENS-MIND, Departament d’Enginyeria Electrònica I Biomèdica, Universitat de Barcelona, 08028 Barcelona, Spain
3. Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Zürich, CH-8093, Switzerland
4. Nanochemistry Department, Istituto Italiano di Tecnologia, via Morego 30, 16130 Genova, Italy
5. EMPA-Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, CH-8600, Switzerland
6. Institute of Nanoscience and Nanotechnology (In2UB), Universitat de Barcelona, 08028 Barcelona, Spain
7. ICREA, Pg. Lluís Companys 23, 08010 Barcelona, Spain