A5101776539- Electrohydrodynamics and Fluid Dynamics
- Microfluidic and Bio-sensing Technologies
- Electrowetting and Microfluidic Technologies
- Microfluidic and Capillary Electrophoresis Applications
- Innovative Microfluidic and Catalytic Techniques Innovation
- Advanced Photocatalysis Techniques
- Surface Modification and Superhydrophobicity
- Catalytic Processes in Materials Science
- Nanomaterials and Printing Technologies
- Neuroscience and Neural Engineering
- Nanomaterials for catalytic reactions
- Advanced battery technologies research
- Fluid Dynamics and Heat Transfer
- Aerosol Filtration and Electrostatic Precipitation
- Synthesis and Characterization of Pyrroles
- Cyclopropane Reaction Mechanisms
- 3D Printing in Biomedical Research
- Orbital Angular Momentum in Optics
- Fuel Cells and Related Materials
- Asymmetric Hydrogenation and Catalysis
- TiO2 Photocatalysis and Solar Cells
- Transition Metal Oxide Nanomaterials
- Microplastics and Plastic Pollution
- Extracellular vesicles in disease
- Silk-based biomaterials and applications
Yonsei University
2023-2025
Sungkyunkwan University
2007-2024
Seoul National University
2005-2024
Korea Advanced Institute of Science and Technology
2005
Pohang University of Science and Technology
2003
Monodisperse spherical Ni nanoparticles with diameters of 2 nm, 5 and 7 nm were synthesized from the thermal decomposition a Ni–oleylamine complex. nanocrystal superlattices generated via controlled evaporation solvent (see Figure). The successfully used as catalysts for Suzuki coupling reaction, readily oxidized to produce NiO nanoparticles.
Scaling up photocatalytic systems for large-scale hydrogen generation holds transformative potential sustainable energy but faces significant technical and economic challenges in transitioning from lab-scale experiments to industrial applications. This review delves into recent innovations that drive progress this field, including advanced materials developed improved efficiency stability, as well innovative reactor designs optimize light capture reactant flow. It also examines practical...
Abstract The application of extracellular vesicles (EVs) as vehicles for anti‐Parkinson's agents represents a significant advance, yet their clinical translation is hampered by challenges in efficient brain delivery and complex blood‐brain barrier (BBB) targeting strategies. In this study, we engineered dopamine onto the surface adipose‐derived stem cell EVs (Dopa‐EVs) utilizing facile, two‐step cross‐linking approach. This engineering enhanced neuronal uptake primary neurons neuroblastoma...
Abstract The lack of highly efficient photoanodes presents a significant challenge to implementing the promising strategy unbiased solar‐to‐fuel conversion. To achieve high‐performance photoanodes, improving their light harvesting and charge separation/injection capabilities is indispensable. Herein, solution‐processed vertically oriented Sb 2 S 3 nanorod arrays on substrate are obtained via Au seed layer, resulting in improved optoelectronic properties (due scattering effect) favorable...
Although the use of Cu(II) salts as catalysts without reductants is limited in cycloaddition acetylenes with azides, catalytic system employing average 10 nm CuO(II) nanoparticles absence shows good activity to form 1,4-disubstituted 1,2,3-triazoles even wet THF well water. It also noticeable that nanoparticle can be recycled consistent activity. A range alkynes and azides were subject optimized nanoparticle-catalyzed reaction conditions afford desired products yields.
During electro-hydrodynamic printing, part of discharged jets may be broken into tiny satellites/sprays, making patterns scattered. This paper presents a method suppressing these satellites/sprays based on ring-shaped gate electrode placed in between nozzle and substrate. We discover, by simulation experimentation, that the maximum satellite/spray suppression can achieved when diameter hole distance from to are, respectively, about 5, 2.5 times outer voltage applied has waveform negative...
This paper presents design and fabrication of optimized geometry structure electrostatic inkjet head. In order to verify effect shape, we simulate electric field intensity according the head structure. The strength increases linearly with increasing height micro nozzle. As nozzle diameter decreases, along periphery meniscus can be more concentrated. We fabricate heads, hole type pole type, It was fabricated using thick-thermal oxidation silicon micromachining technique such as deep reactive...
We report the synthesis of a novel organic–inorganic hybrid composite comprising C 3 N 5 integrated with CeO 2 engineered to significantly enhance photocatalytic hydrogen evolution.
Mn quinonoid core/Rh shell structures are prepared in a step-by-step manner and characterized by variety of instrumental analysis techniques. The core/shell nanospheres show better catalytic activities carbene transfer reaction EDA than Rh nanospheres, because more catalysts can be using the same amount rhodium metal.
This paper presents a novel oxygen micropump which generates pumping power through the production of gas. Hydrogen peroxide is separated from catalyst by oily paraffin. The decomposition hydrogen can be commenced melting paraffin an underlaid microheater. An initial triggering input electric current resulted in continuous gas peroxide. Liquid sample within was pushed produced and flew microchannel. Oxygen micropumps continued working for 10 to 30 minutes.
This paper describes fabrication of a micro cell counter integrated with an oxygen micropump and counting experiment Sephadex G-25 beads (70~100㎛). The pumping part consisted microheater, catalyst (manganese dioxide) enveloped paraffin, hydrogen peroxide, microchannel, the collimated light, microwindow, phototransistor including external circuit.<br/> generated gas by decomposing peroxide manganese dioxide, which was initiated melting paraffin pumped in microchannel. When passed they shaded...
A flow-through in-line/staggered type micro blood filter has been proposed for the purpose of separating cell and plasma from whole blood. The have fabricated in simple design process by silicon micromachining tested their percent efficiency diluted samples.
A novel cell count method. which can improve the efficiency and reduce contamination problem, was presented using micro lattice engraved on culture dish. The has feature of 50㎛×50㎛ rectangular shape, 2㎛ line width, 2 ㎛ depth in 3 mm×3 mm area. In this paper, nickel mold fabricated with thickness diameter 80 mm, transcription a polystyrene dish performed by hot embossing at 200°C. tedious error-prone harvestlload processes conventional counts hemocytometer could be omitted, these advantages...
This paper describes a novel cell counting method with boron diffused resistor. It utilizes the photoconductive property of and Bio-MEMS technology. When cells shade resistor from light by passing over window, signals are generated due to resistance changes Fabrication two kinds devices, having windows silicon dioxide layer nitride membrane, discussions on experiments micro beads presented. Proposed can be used in counter or LOC (Lab-on-a-chip).