1. Department of Applied Chemistry; Faculty of Science and Technology; Keio University; 3-14-1 Hiyoshi Kohoku-ku Yokohama 223-8522 Japan
2. Laboratory of Materials and Interface Chemistry and Center for Multiscale Electron Microscopy; Department of Chemical Engineering and Chemistry; Eindhoven University of Technology; P. O. Box 513 5600 MB Eindhoven The Netherlands