1. a Department of Physics , Liquid Crystal Institute, Kent State University , Kent , OH , 44242
2. b Department of Macromolecular Science , Case Western Reserve University , Cleveland , OH , 44106
3. c Department of Chemical Engineering , Case Western Reserve University , Cleveland , OH , 44106
4. d Department of Textile and Polymeric Materials , Tokyo Institute of Technology , Ookayama, Meguro-ku, Tokyo , 152