1. Department of Materials Science and Engineering, Graduate School of Engineering, Osaka University
2. Low Temperature Center, Osaka University
3. Department of Materials Science and Engineering, Faculty of Engineering, Kansai University
4. Research Institute for Advanced Science & Technology, Osaka Prefecture University
5. Division of Energy Science, Center for Integrated Research in Science and Engineering, Nagoya University
6. Department of Applied Chemistry, School of Engineering, The University of Tokyo