Korea University · Engineering
Professor Jae-Chul Lee's research lab specializes in the design, synthesis, and characterization of advanced functional materials, with a focus on nanomaterials, polymer science, and magnetic nanostructures. The lab investigates the self-assembly and transformation of gold nanostructures in block copolymer matrices, the thermodynamic behavior of protein-polymer interactions, and the dynamics of magnetic domain walls in metallic nanowires. Additionally, the group explores precision polymerization techniques, such as ruthenium-catalyzed ring-opening polymerization, to create well-defined, stereoregular polymers with tailored functionalities. These interdisciplinary efforts bridge materials chemistry, soft matter physics, and nanotechnology to develop materials for next-generation applications in biomedicine, electronics, and energy.
Figures are computed from collected data and may differ slightly.
Gold nanostructures —nanowires and nanosheets—are reported to have been prepared from the gold salt HAuCl 4 in a solid bulk phase of a block copolymer. The Figure shows a SEM image of nanosheets formed by thermal reduction at 70 °C. If water is included in the initial mixture and the reduction occurs by UV irradiation, predominantly nanowires are produced. Reasons for this distinction are discussed.
Preferential solvent interactions between polyethylene glycols and five proteins were investigated by density measurements and analyzed by the multicomponent theory. These measurements were conducted as a function of concentration and molecular size of the synthetic polymer at different pH values. The results showed that proteins are preferentially hydrated under the experimental conditions employed, i.e. polyethylene glycol is excluded from the protein domain. The introduction of protein thermo
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