1. Department of Theoretical Chemistry and Biology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, SE-106 91 Stockholm, Sweden
2. Laboratory of Organic Electronics, ITN, Linköping University, 581 83 LinköpingSweden
3. Scientific Visualization Group, ITN, Linköping University, 581 83 Linköping, Sweden
4. Swedish e-Science Research Center (SeRC), Linköping University, 581 83 LinköpingSweden