1. Helmholtz-Zentrum Berlin für Materialien und Energie GmbH. Hahn-Meitner-Platz 1, 14109 Berlin, Germany
2. Institut für Physik & IRIS Adlershof, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
3. Institute for Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Straße 24-25, 14476 Potsdam-Golm, Germany
4. Department of Physics “Ettore Pancini”, University of Naples Federico II, Comp. Univ. Monte S. Angelo, via Cintia 26, 80126 Naples, Italy
5. The Chinese University of Hong Kong, Electronic Engineering Department, Shatin N.T., Hong Kong 999077, People’s Republic of China
6. Department of Chemical Sciences, University of Naples Federico II, Comp. Univ.
Monte S. Angelo, Via Cintia 26, 80126 Naples, Italy
7. Department of Chemistry, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany
8. Department of Chemical Materials and Production Engineering, University of Naples Federico II, Piazzale Vincenzo Tecchio 80, 80125 Naples, Italy