1. Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 412 96 Göteborg, Sweden
2. Laboratory of Organic Electronics, ITN, Linköping University, 601 74 Norrköping, Sweden
3. Umeå Center for Electron Microscopy (UCEM), Department of Chemistry, Umeå University, 901 87 Umeå, Sweden
4. Department of Industrial and Materials Science, Chalmers University of Technology, 412 96 Göteborg, Sweden
5. Wallenberg Wood Science Center, Chalmers University of Technology, 412 96 Göteborg, Sweden
6. Wallenberg Wood Science Center, Linköping University, 581 83 Linköping, Sweden