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연구실 : http://ptfl.yonsei.ac.kr/
교수님 소개 introdution
Block copolymers can self-assemble to form nanoscale structures with limited phase separation to the dimensions of the copolymer chains due to the connectivity of two chains. This nanophase separation makes it nano-sized domains with 10-100 nm scale, different from macrophase separation. These ability of block copolymer offers the potential to fabrication high-density arrays for application to data storage and nano porous materials by the directed orientation of nano-structures to the desired direction in thin film.
Thus, in order to achieve these goal, the strategy is focused on the following contents to control self-assembled nanostructure of the block copolymer and their synthesis.
1. Block copolymer synthesis by molecular design - To analyze nano structure and fabricate thin film, synthesis of block copolymer what we want must be done first. Therefore technologies should be acquired by molecular-designing and synthesizing of block copolymers. Anionic polymerization can be elaborately used to control the molecular weight and ATRP (Atom Transfer Radical Polymerization) to produce general-purpose products.
2. Bio-molecule adhesion to patterned substrates - Nano-patterned substrates with functional groups formed by self-assembly of block copolymer and manipulation of surface properties allows effective control specific interaction between the substituted surface and bio-molecules by tuning over the surface functional density. These technological applications can be used in specialty photoresists, sensors, microfluidic networks, etc.
3. Nano structure analysis by small angle X-ray and neutron scattering experiment - The physics behind the microstructure of block copolymers has been extensively investigated over the past three decade. If the covalently linked constituent polymer blocks are immiscible, phase separation is induced on a scale that is directly related to the size (block volume ratio) of the copolymer chains, resulting in various morphologies such as spherical, cylindrical, gyroid, and lamellar phases. The formation of such structures, which have been determined with SAXS, SANS and GISAXS. These scattering methods are very powerful to investigate self-assembled properties and order-to-disorder (order-to-order) transition of the block copolymers.
Mar. 1990 Aug. 1996: Dep. Polymer Science in Kyungbuk National University (included military service for 30 months) (B.S.) - Early Graduation.
Mar. 1997 Feb. 1999: Polymer Research Institute, Dep. Chemical Engineering in POSTECH (M.S.). Title: The aromatic hydrocarbon resins with various hydrogenation degrees; (1) the phase behavior
and miscibility and (2) the adhesion and viscoelastic properties of the mixtures of resins and block copolymers.
Mar. 1999 Feb. 2003: Polymer Research Institute, Dep. Chemical Engineering in POSTECH (Ph D.). Title: A New Type of Phase Behavior in Block Copolymers & Homopolymer/Homopolymer Blends.
● TEACHING AND RESEARCH EXPERIENCES
Teaching Assistant in Dep. of Chemical Engineering, POSTECH, spring in1998 and 2001
Research Assistant in Dep. of Chemical Engineering, POSTECH, 2002 - 2003
Feb. 2003 Sep. 2003: Post-Doc Researcher. Polymer Research Institute, Division of Electrical and Computer Engineering in POSTECH. Title: Block Copolymers in Nano-Sciences.
Research Advisor: Professor Jin Kon Kim.
Sep. 2003 Jul. 2005: Post-Doc Researcher: Department of Polymer Science and Engineering, Silvio O. Conte National Center for Polymer Research, University of Massachusetts Amherst. Title: Block Copolymer Application for IT, NT, and BT.
Research Advisor: Professor Thomas P. Russell.
Research Coworkers: Peter P. Pershan (Harvard University), Gareth H. Mckinely (MIT), Milton W. Cole, Paul E. Sokol (Pennsylvania State University), Ben Ocko and Oleg Gang (Brookhaven National Laboratory), and Craig J. Hawker (IBM, Almaden).
Member of the Polymer Society of Korea, Apr. 1997 ~ present.
Member of the Korean Society of Rheology. Apr. 2002 ~ present.
Member of the American Physical Society (DPOLY), Dec. 2000 ~ present.
IPNS (Intense Pulsed Neutron Source) in Argonne National Laboratory, USA.
NIST (National Institute of Standards and Technology) Center for Neutron Research, USA.
● AWARDS & HONORS
Selected in "Science Concentrates" of Chemical & Engineering News, 83, 29 (2005. 04)
The excellent research award in 2004 of Pohang Accelerator Laboratory (PAL, KOSUA) (2004.12)
The excellent PHD award in 2003 of the Polymer Society of Korea (2003.04).
Selected in MRSEC nugget in University of Massachusetts at Amherst in 2003.
Selected in "News and Views" of Nature Materials, 1, 85 (2002.10)
KBNU academic scholarship as summa cum laude at fall 1993, spring 1994, fall 1994, spring 1995, fall 1995, spring 1996 (All Semesters, Early Graduation)
연구분야 research field
Polymer Nano-structured Materials and Thin films.
Advanced Functional Materials.
Soft Condensed Matters.
PUBLICATION IN PAPERS (all Impact Factors issued in 2004)
(1) J. K. Kim, D. Y. Ryu, K. Lee, "The aromatic hydrocarbon resins with various hydrogenation degrees, Part 1. The phase behavior and miscibility with polybutadiene and with polystyrene", Polymer, 41, 5195-5205 (2000.06). IF (2.433)
(2) D. Y. Ryu, J. K. Kim, "The aromatic hydrocarbon resins with various hydrogenation degrees, Part2. The adhesion and viscoelastic properties of the mixtures of resins and block copolymers", Polymer, 41, 5207-5218 (2000.06). IF (2.433)
(3) D. Y. Ryu, U. Jeong, J. K. Kim, and T. P. Russell, "Closed-Loop Phase Behavior in Block Copolymers" Nature Materials. 1, 114-117 (2002.10). IF (13.531), selected in "News and Views" of Nature Materials, 1, 85 (2002.10)
(4) D. Y. Ryu, M. S. Park, S. H. Chae, Jin Jang, J. K. Kim and T. P. Russell, "Phase Behavior of Polystyrene/poly(n-pentyl methacrylate)", Macromolecules, 35, 8676-8680 (2002.11). IF (3.898)
(5) D. Y. Ryu, U. Jeong, D. H. Lee, J. Kim, H. S. Youn and J. K. Kim, "Phase Behavior of deuterated polystyrene-block-poly(n-pentyl methacrylate) copolymers", Macromolecules, 36, 2894-2902 (2003.04). IF (3.898)
(6) U. Jeong, D. Y. Ryu, J. K. Kim, D. H. Kim, T. P. Russell, and C. J. Hawker "Volume Contractions Induced by Crosslinking: A novel Route to Nanoporous Polymer Films ", Advanced Materials 15, 1247-1250 (2003.08). IF (8.079)
(7) 김진곤, 류두열, "압력 가소성 블록 공중합체의 합성 및 소각 중성자 산란법에 의한 해석", Hanaro Newsletter, 9(3), 6-7 (2003.07). IF (not available)
(8) U. Jeong, D. Y. Ryu, D. H. Ko, D. H. Lee, J. K. Kim, and T. P. Russell, "Phase Behavior of Mixtures of Block Copolymer and Homopolymers in Thin Films and Bulk", Macromolecules, 36, 3626-3634 (2003.05). IF (3.898)
(9) U. Jeong, D. Y. Ryu, and J. K. Kim, "Phase Behavior of Polystyrene-block-poly(n-butylmethacrylate) Copolymers with Various End-Functional Groups", Macromolecules, 36, 8913-8918 (2003.12). IF (3.898)
(10) U. Jeong, D. Y. Ryu, J. K. Kim, D. H. Kim, X. Wu, and T. P. Russell, "Precise Control of Nanopore Size in Thin Film Using Mixtures of Asymmetric Block Copolymer and Homopolymer", Macromolecules, 36, 10126-10129 (2003.12). IF (3.898)
(11) D. Y. Ryu, D. J. Lee, J. K. Kim, K. A. Lavery, T. P. Russell, Y. S. Han, B. S. Sung, C. H. Lee, and P. Thiyagarajan, "The effect of Hydrostatic Pressure on Closed-Loop Phase Behavior of Block Copolymers", Phys. Rev. Letts., 90, 235501 (2003.06). IF (7.218)
(12) U. Jeong, D. Y. Ryu, D. H. Kho, J. K. Kim, J. T. Gnewbach, D. H. Kim, and T. P. Russell, "Enhancement in the Orientation of Microdomain in Block Copolymer Thin Films using Added Homopolymer", Advanced Materials, 16, 533-536 (2004.03). IF (8.079)
(13) D. Y. Ryu, D. H. Lee, U. Jeong, S. H. Yun, S. Park, K. Kwon, B. H. Sohn, T. Chang, J. K. Kim, and T. P. Russell, "Closed-Loop Phase Behavior of polystyrene-block-poly(n-pentyl methacrylate) Copolymers with various Block Length Ratios", Macromolecules, 37, 3717-3724 (2004.05). IF (3.898)
(14) D. Y. Ryu, D. H. Lee, J. Jang, J. K. Kim, K. A. Lavery, T. P. Russell, "Complex Phase Behavior of a Weakly Interacting Binary Polymer Blend", Macromolecules, 37, 5851-5855 (2004.08). IF (3.898)
(15) J. K. Kim, J. Jang, D. H. Lee, and D. Y. Ryu, "Phase Behavior of Polystyrene and Poly(n-pentyl methacrylate) Blend with small amounts of Symmetric Polystyrene-block-Poly(n-pentyl methacrylate) Copolymers", Macromolecules, 37, 8599-8605 (2004.11). IF (3.898)
(16) J. S. Kim, K. H. Lee, S. M. Jo, D. Y. Ryu, and J. K. Kim, "Microphase Separation and Crystallization in Binary Blends Consisting of Poly(methyl methacrylate)-block-Polystyrene Copolymer and Poly(vinylidene fluoride)", Polymer (Korea), 28, 509-518 (2004.11). IF (0.522)
(17) Q. Zhang, T. Xu, D. Butterfield, M. J. Misner, D. Y. Ryu, T. Emrick, and T. P. Russell, "Controlled Placement of CdSe Nanoparticles in Diblock Copolymer Templates by Electrophoretic Deposition", Nano Letters, 5, 357-361 (2005.02). IF (8.449)
(18) E. Drockenmuller, L. Y. T. LI, D. Y. Ryu, E. Harth, T. P. Russell, H. Kim, and C. J. Hawker, "Covalent Stabilization of Nanostructures: Robust Block Copolymer Templates from Novel Thermo-Reactive Systems", J. Polym. Sci.Part A: Polym. Chem., 43, 1028-1037 (2005.03). IF (2.773)
(19) D. Y. Ryu, K. Shin, E. Drockenmuller, C. J. Hawker, T. P. Russell, "A Generalized Approach to Surface Modification", Science, 308, 236-239 (2005.04). IF (31.853), selected in "Science Concentrates" of Chemical & Engineering News, 83, 29 (2005. 04)
(20) H. Y. Kim, D. Y. Ryu, U. Jeong, D. H. Kho and J. K. Kim, "The Effect of Chain Architecture of In-Situ Formed Copolymers on Interfacial Morphology of Reactive Polymer Blends", Macromol. Rap. Com., 26, 1428-1433 (2005. 09). IF (3.366)
(21) A. Agrawal, J. Park, D. Y. Ryu, P. T. Hammond, T. P. Russell, and G. H. McKinley, "Controlling the Location and Spatial Extent of Nanobubbles Using Hydrophobically Nanopatterned Surfaces", Nano Letters, ASAP. IF (8.449)