1. Technical Chemistry I and Center for Nanointegration Duisburg‐Essen (CENIDE)University of Duisburg‐Essen Universitaetsstrasse 7 Essen 45141 Germany
2. Chair for Manufacturing TechnologyUniversity of Duisburg‐Essen Lotharstrasse 1 Duisburg 47057 Germany
3. Institute of Organic Chemistry and CENIDEUniversity of Duisburg‐Essen Universitaetsstraße 7 Essen 45141 Germany