1. Department of Chemistry and Food Chemistry; Center for Advancing Electronics Dresden (CFAED); Technische Universität Dresden; 01062 Dresden Germany
2. Max Planck Institute for Polymer Research; Ackermannweg 10 55128 Mainz Germany
3. State Key Laboratory of Coal Conversion; Institute of Coal Chemistry; Chinese Academy of Sciences; Taiyuan 030001 China
4. Department of Chemistry and Food Chemistry; Technische Universität Dresden; 01069 Dresden Germany
5. Dresden Center for Nanoanalysis (DCN); Center for Advancing Electronics Dresden (CFAED); Technische Universität Dresden; 01062 Dresden Germany