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Dr. Ryu received his B.S. and M.S. in Chemical Technology from the Seoul National University in 1990 and 1992, respectively, and Ph.D. in Chemical Engineering from the University of Minnesota in 1998 working with Professor Tim Lodge. Following a postdoctoral in the Materials Research Laboratory at the University of California at Santa Barbara with Professors Ed Kramer and Glenn Fredrickson, he joined the faculty at RPI in 2000.
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
Filmsb
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.
"Density
Control of Single Walled Carbon Nanotubes using Patterned Iron
Nanoparticle Catalysts derived from Phase Separated Thin Films
of a Polyferrocene Block Copolymer."
Sarah Lastella, Yung Joon Jung, Hoichang Yang, Robert Vajtai,
Pulickel M. Ajayan*, Chang Y. Ryu*, David A.
Rider, Ian Manners*. J. Mater. Chem.
(2004) accepted.
"Fabrication
of Superhydrophobic Surface from a Supramolecular Organosilane
with Quadruple Hydrogen Bonding." Han,
J. T.; Lee, D. H.; Ryu, C. Y.; Cho, K.* J.
Am. Chem. Soc.-Communications 126 (15): 4796-4797
(2004).
"Single-step in situ synthesis of polymer-grafted
single-wall nanotube composites." Viswanathan,
G.; Chakrapani, N.; Yang, H.C.; Wei, B. Q.; Chung, H. S.; Cho,
K. W.; Ryu, C. Y.*; Ajayan, P. M.*
J. Am. Chem. Soc.-Communications 125 (31): 9258-9259
(2003).
"Selective positioning and density control of
nanotubes within a polymer thin film." Lahiff
E, Ryu CY, Curran S, Minett AI, Blau WJ, Ajayan
PM*. Nano Letters 3 (10): 1333-1337
(2003).
"HPLC Separation of Regioregular Poly(3-hexylthiopene)
and its Microcrystalline 'Nano-rods' domains in Thin Film Transistors."
Yang H, Park S, Kim D, Oh K, Magonov S, Cho K, Chang T, Bao
Z, Ryu CY*. Polymer Preprints 44(2):
333-334 (2003).
"Cu/Zn superoxide dismutase can form pore-like
structures." Chung J, Yang HC, de Beus MD, Ryu
CY, Cho K, Colon W*. Biochemical and Biophysical
Research - Communications 312: 873-876 (2003).
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