Affiliation: | 1.Department of Chemical Engineering, Pohang University of Science and Technology(POSTECH), Pohang, 790-784, Korea;2.Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, USA;3.National Center for Nanomaterials Technology (NCNT), Pohang, 790-784, Korea;4.Central Advanced Research and Engineering Institute, Hyundai Motor Company, Uiwang, 437-718, Korea |