1. Department of Polymer Science & EngineeringPolymeric Nanomaterials LaboratorySchool of Applied Chemical EngineeringKyungpook National University 1370 Sankyuk-dong, Buk-ku Daegu 702-701 Korea
2. Department of Chemistry and Chemical EngineeringGraduate School of Science and TechnologyCenter for Transdisciplinary ResearchNiigata University Ikarashi 2-8050, Nishi-ku Niigata 950-2181 Japan