个人简介

Ph.D., Chemical Engineering, University of Minnesota, 1998 B.S., M.S., Chemical Technology, Seoul National University, 1990, 1992

研究领域

Physical/Analytical/Polymer/Materials

Macromolecular Separation and Adsorption Our group is studying macromolecular separation and adsorption using high performance liquid chromatography (HPLC). We study polymer separation by HPLC and explore its unique applications for rigorous analysis and purification of polymers, block copolymers and functional oligomers. We also pursue a molecular level understanding of polymer/copolymer adsorption in confined geometries in order to gain insights on macromolecular interactions during HPLC. We are mainly interested in separating (co)polymers and oligomers that are synthetically very challenging to obtain as pure samples and/or can have technological implications in nanoscale self-assembly, electro-optical applications, and carbon nanotube fabrication. Block Copolymer Self-Assembly in Solution and Thin Films We are interested in developing a polymer research program in structure-property relationships of multiphase polymer systems, where their performance and applications are closely related to the mesoscopic morphologies. The central theme of my research effort will be the design, synthesis, and characterization of model polymers and the study of their structure-property relationships as in bulk and thin films. We will combine the polymer separation technique using HPLC to obtain pure block copolymers and study their self-assembly in solution and thin films. The ultimate aim will be to guide the rational design of polymeric materials, thus gaining a fundamental understanding in the correlation between properties and structures in multiphase polymers. Polymer-Carbon Nanotube Hybrid Materials Carbon nanotubes (CNTs) have many desirable characteristics such as high mechanical strengths and high conductivity. We developed novel polymer-carbon nanotubes hybrid materials by grafting polymer chains to the nanotubes using anionic polymerization techniques. Possible applications of the hybrid materials include structural reinforcements in composite materials, because the grafted polymer chains improve the adhesion between stiff nanotubes and polymer matrix.

近期论文

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C. Y. Ryu*, J. Han, W. S. Lyoo, “Block Copolymer Analysis and Purification” . Polym Sci.: Polym. Phys. Ed. 2010, 48(24), 2561 – 2565. (Featured as Viewpoint Article) G. W. Shin, H. S. Hwang, S. W. Seo, M. H. Oh, C. Y. Ryu, C. J. Salvo, S. Feldman, J. S. Doh, G. Y. Jung*, “A Novel Pathogen Detection System Based on High-Resolution CE-SSCP using a Triblock Copolymer Matrix”, J. Sep. Sci. 2010, 33, 1-5. J. Han, B. H. Jeon, C. Y. Ryu*, J. J. Semler, Y. K. Jhon, J. Genzer* “Discriminating Among Co-monomer Sequence Distributions in Random Copolymers Using Interaction Chromatography”, Macromol. Rapid. Commun. 2009, 30, 1543-1548 (Featured as the cover article of the journal.) A. I. Abdulahad and C. Y. Ryu* “Liquid Chromatography at the Critical Condition: Thermodynamic Significance and Influence of Pore Size” J. Polym Sci.: Polym. Phys. Ed. 2009, 47(24), 2533 - 2540. S. W. LeFevre, H. Choi, T. Chang, C. Y. Ryu* “Temperature-Rise Fractionation of Poly(3-alkyl thiophenes) J. Polym Sci.: Polym. Phys. Ed. 2009, 47(24), 2547 - 2555. N. Jung, H. Seo, D. Lee, C. Y. Ryu, S. Jeon* “Nanomechanical thermal analysis of the glass transition of polystyrene using silicon cantilevers” Macromolecules 2008, 41(19), 6873-6875. H. Yang, L. Yang, M.-M. Ling, S. Lastella, D. D. Gandhi, G. Ramanath, Z. Bao, and C. Y. Ryu* “Aging susceptibility of terrace-like pentacene films” J. Phys. Chem. C 2008, 112, 16161-16165. (Journal cover article) H. Yang, T. J. Shin, Z. Bao, C. Y. Ryu “Solubility-Driven Thin Film Structures of Regioregular Poly(3-hexyl thiophene) Using Volatile Solvents” J. Appl. Phys. 2007, 90(17), Art No. 172115. H. Yang, T. J. Shin, Z. Bao, C. Y. Ryu “Structural Transitions of Nanocrystalline Domains in Regioregular Poly(3-hexyl thiophene) Thin Films” J. Polym Sci.: Polym. Phys. Ed. 2007, 45(11), 1303-1312. S. Lastella, , H. Yang, P. M. Ajayan, C. Y. Ryu, D. Rider and I. Manners “Influences of Organometallic Polymer-Derived Catalyst Dispersion on SWNT Growth” ” J. Polym Sci.: Polym. Phys. Ed. 2007, 45(7), 758-765. J. Y. Hyun, J. W. Han, C. Y. Ryu, L. V. Interrante “Synthesis of cyclolinear poly(carbosilane)-g-poly(methyl methacrylate or styrene) random copolymers” Macromolecules 2006, 39 (25), 8684-8691. W. Kim, J. Han, C. Y. Ryu, H. Yang “Chemical composition effects on the fracture of polystyrene-block-poly(methyl methacrylate) block copolymers” J. Polym Sci.: Polym. Phys. Ed. 2006, 44 (24), 3612-3620. C. Li, J. W. Han, C. Y. Ryu, B. C. Benicewicz “A versatile method to prepare RAFT agent anchored substrates and the preparation of PMMA grafted nanoparticles” Macromolecules 2006, 39 (9), 3175-3183. I. Park, S. Park, H.-W. Park, T. Chang, H. Yang, C. Y. Ryu “Unexpected Hexagonally Perforated Layer Morphology of PS-b-PMMA Block Copolymer in Supported Thin Film” Macromolecules 2006, 39 (1), 315-318. H. Yang, T. Shin, M.-M. Ling, K. Cho, C. Y. Ryu, Z. Bao, “Conducting AFM and 2D GIXD Studies on Pentacene Thin Films” J. Am. Chem. Soc. 2005, 127(33), 11542-11543. (Times cited: 0) S. Park, I. Park, T. Chang, C. Y. Ryu “Interaction-Controlled HPLC for block copolymer analysis and separation” J. Am. Chem. Soc. 2004, 126 (29), 8906-8907 (Times cited: 4) X. W. Yang, F. J. Hua, K. Yamato, E. Ruckenstein, B. Gong, W. Kim, C.Y. Ryu “Supramolecular AB Diblock Copolymers” Angew. Chem. Int. Ed. 2004, 43(47), 6471-6474. (Time cited: 6) Han, J. T.; Lee, D. H.; Ryu, C. Y.; Cho, K. “Fabrication of superhydrophobic surface from a supramolecular organosilane with quadruple hydrogen bonding” J. Am. Chem. Soc. 2004,126 (15), 4796-4797.