1. a Research Center for Machine Parts and Materials Processing , Department of Chemistry , University of Ulsan , Ulsan, Republic of Korea
2. c Research Center for Machine Parts and Materials Processing , Department of Chemistry , University of Ulsan , Ulsan, 680-749, Republic of Korea
3. b Department of Chemical Engineering and Polymer Research , Institute for Advanced Functional Polymers , Pohang University of Science and Technology , Pohang, Republic of Korea