1. WPI
Advanced Institute for Materials Research, Tohoku University, 2-1-1
Katahira, Sendai, 980-8577, Japan
2. Materials Science and Engineering, Texas A&M University, College Station, Texas 77843-3003, United States
3. Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843-3120, United States
4. School
of Computational Sciences, Korea Institute for Advanced Study, Seoul 130-722, Korea
5. Department of Physics and Astronomy, Texas A&M University, College Station, Texas 77843-4242, United States