1. Inorganic Materials Chemistry; Ruhr-University Bochum; Universitätsstr. 150 44801 Bochum Germany
2. Electrical Engineering and Plasma Technology; Ruhr-University Bochum; Universitätsstr. 150 44801 Bochum Germany
3. Technical and Macromolecular Chemistry; University of Paderborn; Warburgerstr. 100 33098 Paderborn Germany
4. Department of Applied Physics; Eindhoven University of Technology; P.O. Box 513 5600 MB Eindhoven The Netherlands
5. RUBION; Ruhr-University Bochum; Universitätsstr. 150 44801 Bochum Germany