1. University of Lund, Physical Chemistry 1, Center for Chemistry and Chemical Engineering, P.O. Box 124, S-22100 Lund, Sweden, Ghent University, Particle and Interfacial Technology Group, Faculty of Bioscience Engineering, Coupure Links 653, B-9000 Gent, Belgium, and University of Lund, Biophysical Chemistry, Center for Chemistry and Chemical Engineering, P.O. Box 124, S-22100 Lund, Sweden