1 Materials Fabrication Laboratory, RIKEN, Saitama 351-0198, Japan
2 Department of Modern Mechanical Engineering, Waseda University, Tokyo 169-8555, Japan
3 Department of Mechanical Systems Engineering, Ibaraki University, Ibaraki 316-8511, Japan
4 Department of Mechanical Engineering, Kyushu University, Fukuoka 819-0395, Japan
5 New technology developments, Akita Industrial Technology Centre, Akita 010-1623, Japan
6 Department of Industrial Chemistry, Tokyo University of Science, Tokyo 162-8601, Japan