1. Department of Chemistry
2. Faculty of Science and Technology
3. Keio University
4. Yokohama 223-8522
5. Japan
6. Keio Institute of Pure and Applied Science (KiPAS)
7. Nakajima Designer Nanocluster Assembly Project
8. Exploratory Research for Advanced Technology (ERATO)
9. Japan Science and Technology Agency
10. Kawasaki 213-0012