1. Applied Physics Program; University of Michigan; Ann Arbor MI 48109-1040 USA
2. Institute of Chemistry and Biology of Membranes and Nanoobjects, CNRS, CBMN, UMR 5248; University of Bordeaux; 33600 Pessac France
3. Graduate School of Engineering; Yokohama National University; 79-5 Tokiwadai Hodogaya-ku Yokohama 240-8501 Japan
4. Department of Chemistry and Biophysics Program; University of Michigan; 930 North University Avenue Ann Arbor MI 48109-1055 USA