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Chang Y. Ryu Education: Career Highlights: Research Interests: Ryu is researching synthesis and characterization of heterogeneous polymers such as polymer blends and block polymers, and polymer-carbon nanotube hybrid materials. He is studying structure-property relationships of multiphase polymer systems, where their performance and applications are closely related to the mesoscopic morphologies. Ryu is working to develop a synthesis protocol that allows researchers to design and manufacture the model polymers and is also considering the application of these techniques to solve industrially relevant problems. He aims to guide the rational design of polymeric materials, thus gaining a fundamental understanding in the correlation between properties and structures in multiphase polymers. He is also interested in developing carbon nanotubes (wires) imbedded in insulating polymer sheath by the synthesis of polymer-carbon nanotube hybrid materials. Polymer grafted nanotubes could result in a "cylinders-in-cylinders" morphology and can be subsequently aligned or "pulled" on a large scale by applying shear, electric field, or magnetic field. These nanotube-containing copolymers will have potential applications in high-resolution flat screen display. Possible applications as structural reinforcements in composite materials for microelectromechanical systems (MEMS) applications are also of interest, because the grafted polymer chains improve the adhesion between stiff nanotubes and polymer matrix. Selected Publications: Yang, X. W.; Hua, F. J.; Yamato, K.; Ruckenstein, E.; Gong, B.; Kim, W.; Ryu, C. Y. "Supramolecular AB diblock copolymers," Angew. Chem.-Int. Edit., 43, 6471-6474, (2004). Han, J. T.; Lee, D. H.; Ryu, C. Y.; Cho, K. W., "Fabrication of superhydrophobic surface from a supramolecular organosilane with quadruple hydrogen bonding," J. Am. Chem. Soc., 126, 4796-4797, (2004). Park, S.; Park, I. ; Chang, T.; Ryu, C. Y. "Interaction-controlled HPLC for block copolymer analysis and separation," J. Am. Chem. Soc. , 126, 8906-8907 (2004). Lastella, S.; Jung, Y. J.; Yang, H. C.; Vajtai, R.; Ajayan, P. M.*; Ryu, C. Y.*; Rider, D. A.; Manners, I., "Density control of single-walled carbon nanotubes using patterned iron nanoparticle catalysts derived from phase-separated thin films of a polyferrocene block copolymer," J. Mater. Chem., 14, 1791-1794, (2004). Cho, J. H.; Lee, D. H.; Shin, H. S.; Pattanayek, S. K.; Ryu, C. Y.; Cho, K.*, "Exploiting Poly(dimethylsiloxane)-Modified Tips To Evaluate Frictional Behavior by Friction Force Microscopy," Langmuir, 20, 11499-11503, (2004). Viswanathan, G.; Chakrapani, N.; Yang, H.C.; Wei, B. Q.; Chung, H. S.; Cho, K. W.; Ryu, C. Y.*; Ajayan, P. M.*, "Single-step in situ synthesis of polymer-grafted single-wall nanotube composites," J. Am. Chem. Soc. , 125, (31), 9258-9259, (2003). Lahiff E, Ryu CY, Curran S, Minett AI, Blau WJ, Ajayan PM*, "Selective positioning and density control of nanotubes within a polymer thin film, " Nano Letters, 3, (10), 1333-1337 (2003). Contact Information: E-mail: ryuc@rpi.edu More Info:
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