Korea University · Engineering
이 교수의 연구실은 고분자 물성, 나노복합재료 및 표면 기반 기술을 중심으로 한 혁신적 연구를 수행하고 있습니다. 특히, 고분자 막의 기계적 거동과 나노구조 제어를 통해 신소재의 기계적 특성과 광학적 성능을 정량적으로 분석하는 데 초점을 맞추고 있으며, 열활성화된 산화 반응 제어 및 나노입자 코팅 기반 광학 소재 개발도 핵심 연구 분야입니다. 이는 바이오의료, 센서, 환경 정화 등 응용 분야로의 확장이 가능합니다.
Figures are computed from collected data and may differ slightly.
This study is the first to demonstrate the capability of Cl<sup>-</sup> to markedly accelerate organic oxidation using thermally activated peroxymonosulfate (PMS) under acidic conditions. The treatment efficiency gain allowed heat-activated PMS to surpass heat-activated peroxydisulfate (PDS). During thermal PMS activation at excess Cl<sup>-</sup>, accelerated oxidation of 4-chlorophenol (susceptible to oxidation by hypochlorous acid (HOCl)) was observed along with significant degradation of benz
We report on the facile preparation of highly scattering metal-coated polystyrene (PS) latex beads by using solvent-controlled heterocoagulation. Starting with an aqueous dispersion of PS beads and poly(vinyl pyrrolidone)-capped metal nanoparticles (NPs), homogeneous and dense metal coatings were obtained by the controlled addition and removal of tetrahydrofuran (THF). Different sizes (30, 60, and 80 nm), chemistries (gold and silver), and shapes (sphere and cube) of NPs were successfully incorp
By combining surface wrinkling and nanopatterned polymer films, we create anisotropic, hierarchical surfaces whose larger length-scale (wrinkling wavelength) depends intimately on the geometry and orientation of the smaller length-scale (nanopattern). We systematically vary the pattern pitch, pattern height, and residual layer thickness to ascertain the dependence of the wrinkling wavelength on the nanopattern geometry. We apply a composite mechanics model to gain a quantitative understanding of
The elastic modulus, fracture strength, and onset fracture strain of supported glassy polystyrene films with a thickness ranging from 250 to 9 nm were quantitatively determined by a recently developed wrinkling-cracking method. Films with a thickness below about 40 nm showed a decrease in both elastic modulus and fracture strength with decreasing film thickness, whereas the onset fracture strain was shown to increase. The observed variations in mechanical properties with respect to the bulk coun
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