1. Helmholtz‐Zentrum Berlin Kekuléstr. 5 Berlin D‐12489 Germany
2. Dipartimento di Scienze Chimiche e Farmaceutiche (DipSCF)Università degli Studi di Ferrara (Unife) Via Luigi Borsari 46 Ferrara I‐44121 Italy
3. Consiglio Nazionale delle RicercheIstituto Officina dei MaterialiCNR‐IOM, CagliariCittadella Universitaria Monserrato CA 09042‐I Italy
4. Faculty of Electrical Engineering and Computer ScienceTechnical University Berlin Marchstraße 23 Berlin 10587 Germany
5. Department of Chemistry and NanoLundLund University Naturvetarvägen 14 Lund 22362 Sweden
6. Department of PhysicsLund University Sölvegatan 14 Lund 22362 Sweden
7. Department of ChemicalMaterials and Production EngineeringUniversity of Naples Federico II Piazzale Tecchio 80, Fuorigrotta Naples 80125 Italy