1. Research
Center for Sustainable Science and Engineering, Institute of Multidisciplinary
Research for Advanced Materials, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan
2. Department
of Mechanical and Aerospace Engineering, School of Engineering, Tohoku University, 6-6, Aramaki, Aoba-ku, Sendai, Miyagi 980-0845, Japan