1. School of Applied Chemical Engineering, Major in Polymer Science and Engineering, Kyungpook National University 1370 Sankyuk-dong, Buk-ku, Daegu 702−701, Korea
2. Daegu Technopark Nano Convergence Practical Application Center, 891−5 Daecheon-dong, Dalseo-ku, Daegu 704−801, Korea
3. Department of Chemistry and Chemical Engineering, Graduate School of Science and Technology, and Center for Transdisciplinary Research, Niigata University, Ikarashi 2-8050, Nishi-ku, Niigata 950-2181, Japan