Research Fellow, National Institute of Aerospace (NIA) (http://www.nianet.org/)
Associate Director, NASA URETI-BIMAT Program   (http://www.bimat.org)
Visiting Research Associate Professor, Dept of Mechanical and Aerospace Engineering, The University of Virginia, Charlottesville

Education:     
Ph.D. in Macromolecular Science & Engineering, The University of Michigan, Feb. 1997.
M.S. in Textile Engineering, Seoul National University, Feb. 1989
B.S. in Textile Engineering, Seoul National University, Feb. 1987

Professional Experience:

Areas of Interest:
The research activities include the development of intelligent multifunctional polymer nanocomposites with nano-scale inclusions for aerospace applications. Sensing and actuating capabilities of nanotube reinforced electroactive polymer nanocomposites have been studied to improve controlled responses upon various external stimuli during aeronautic aviation and space exploration.

Selected Recent Publications

• -“All-Organic Actuator Fabricated with Single Wall Carbon Nanotube Electrodes,” J. Poly. Sci.: Poly. Phys., accepted.
• -“Novel Actuating SWNT Polymer Composites: Intrinsic Unimorph,” Adv. Mater., 20, 2074 (2008).
• -Encyclopedia of Nanoscience and Nanotechnology, 2nd Ed., Chapter: Polymer Nanocomposites and Functionalities, American Scientific Publishers, in press.
• -“Biexcitonic States in Single-Walled Carbon Nanotubes,” J. Phys. Chem. C., 112, 4507 (2008).
•  -“Magnetic property measurements on single Wall carbon nanotube-polyimide composites,” J. Appl. Phys., 103, 023908 (2008).
• -“Origin of the Difference in Order-Disorder Transition Temperature Between Block Copolymers Containing 2-vinylpyridine and Block Copolymers Containing 4-vinylpyridine,” Macromolecules 40, 2109 (2007).
• -“The effect of single-walled carbon nanotubes on the dipole orientation and piezoelectric properties of polymeric nanocomposites, Nano, 1, 77 (2006).
• -“Aligned Single Wall Carbon Nanotube Polymer Composites Using an Electric Field," J. Poly. Sci.: Poly. Phys. 44, 1751 (2006).
• -“Optical Properties and Curing of 2,6-bis(3-aminophenoxy) Benzonitrile /4,4’ Oxidiphthalic Anhydride Poly(amic acid) Films, Polymer, 47, 2822 (2006).
• -“Polyimide/silica hybrid-clay nanocomposites,” Polymer, 46, 9694 (2005).
• -“Magnetic nanowire based high resolution magnetic force microscope probes” Appl. Phys. Lett. 87, 123507 (2005).
•  -“AC and DC percolative conductivity of single wall carbon nanotube polymer composites,” J. Poly. Sci.: Poly. Phys. 43, 3273 (2005).
• -“Ultrafast Dynamics of SWNTs Dispersed in Polymer Films,” J. Phys. Chem., A109 (2005) 289.
• -“In-situ poling and imidization of partially cured polyimide,”Polymer, 45 (2004) 5417.
• -“Stable dispersion of single wall carbon nanotubes in polyimide: the role of noncovalent interactions,” Chem. Phys. Lett. 391 (2004) 207.
• -“Melt Processing of SWNT-Polymer Nanocomposite Fibers,” Composites: B 35 (2004) 439
• -“Adhesion Study of polyimide to single wall carbon nanotube by energy filtered transmission electron microscopy,” Nanotechnology, 14 (2003) L11.
• -“Electrical properties of single wall carbon nanotube reinforced polyimide composites,” Comp. Sci. Tech. 63 (2003) 1637.
• -“Constitutive modeling of nanotube-reinforced polymer composites,” Comp. Sci. Tech. 63 (2003) 1671.
• -“Synthesis, Structure, and Properties of PBO/SWNT Composites,”Macromolecules, 35 (2002) 9039.
• -“Dispersion of Single Wall Carbon Nanotubes by In Situ Polymerization Under Sonication,” Chem. Phys. Lett., 364(2002) 303.
• -“Imaging Carbon Nanotubes in High Performance Polymer Composites via Magnetic Force Microscopy,” Nano. Lett., 2 (2002) 827