1. Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE) University of Duisburg-Essen Universitätsstr. 5–7 45117 Essen Germany
2. Organic Chemistry and Macromolecular Chemistry Heinrich Heine-University Düsseldorf Universitätsstr. 1 40225 Düsseldorf Germany
3. Ernst Ruska-Center for Microscopy and Spectroscopy with Electrons Forschungszentrum Jülich GmbH 52425 Jülich Germany
4. Physical Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE) University of Duisburg-Essen Universitätsstr. 5–7 45117 Essen Germany
5. Institute of Physics University of São Paulo Rua do Matão 1371 São Paulo, São Paulo 05508-090 Brazil