Speaker: Professor, Du Yeol Ryu (Department of Chemical and Biomolecular Engineering, Yonsei University)
Date & Time: 2017년 12월 13일 (수) 16:30
Where: 융대원 D-122호
Block copolymer (BCP) is an excellent candidate to fabricate nanoscopic templates and scaffolds, since the dissimilar polymers linked together covalently self-assemble into the periodic nanostructures with typical feature sizes of 10 – 50 nm. Materialization of well-organized nanostructures has currently been a challenge in response to the increasing demands for high-performance applications such as bio-sensors, water filtration, and nanoscale replication.
In this study, feasible approach to the direct development of gyroid (GYR) nanostructure was proposed using high-molecular-weight block copolymer (BCP) (Mn > 250 kg/mol) of polystyrene-b-poly(methyl methacrylate) (PS-b-PMMA). The target morphologies were successfully produced after the fast evaporation of solvent, because the unique composition (ϕPS = 0.640 ~0.660) of the BCPs could generate the morphological transition during the SVA process, as depicted in Figure. This result suggests its feasible structural tunability to the GYR structure, which would open the possible avenues applicable to other affordable materials.
Ph.D Chemical Engineering, POSTECH, Korea 
M.S. Chemical Engineering, POSTECH, Korea 
B.S. Polymer Science & Engineering, Kyungpook National University, Korea 
Visiting professor, Polymer Science and Engineering, University of Massachusetts – Amherst [2012. 9 – 2013. 8]
Post-doctoral fellow, Polymer Science and Engineering, University of Massachusetts – Amherst [2003. 9 – 2005. 8]
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