1. Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
2. Research Center for Space System Innovation, Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
3. Research Initiative for Supra-Materials, Shinshu University, Nagano 380-8553, Japan
4. Asahi Diamond Industrial Company, Limited, 3-4-35 Kuji, Takatsu-ku, Kawasaki, Kanagawa 213-0032, Japan