1. Technical Chemistry I and Center for Nanointegration Duisburg-Essen (CENIDE); University of Duisburg-Essen; Universitaetsstr. 7 45141 Essen Germany
2. Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE); University of Duisburg-Essen; Lotharstr. 1 47057 Duisburg Germany
3. INNOVENT e.V. Technologieentwicklung; Prüssingstr. 27B, 07745 Jena Germany