1. Department of Materials Science and Engineering, NTNU Norwegian University of Science and Technology, 7491 Trondheim, Norway
2. Department of Chemistry−Ångström Laboratory, Uppsala University, P.O. Box 538, 75121 Uppsala, Sweden
3. Sintef Industry, 7491 Trondheim, Norway
4. Scania CV AB, 151 32 Södertälje, Sweden