1. Department of Materials Science and Technology, Graduate School of Science and Technology; Niigata University; Niigata 950-2181 Japan
2. Center for Transdisciplinary Research; Niigata University; Niigata 950-2181 Japan
3. Graduate School of Technology; Niigata Institute of Technology; Niigata 945-1195 Japan
4. Department of Chemistry; Tokyo Dental College; Tokyo 101-0062 Japan