Seoul National University · Engineering
Professor Young Seok Song's research lab specializes in advanced materials and biopreservation technologies, focusing on nanocomposite materials, cryopreservation of biological cells, and sustainable material development. The lab investigates the dispersion and rheological behavior of carbon nanotubes in polymer matrices, explores microfluidic systems to minimize osmotic shock during cryopreservation, and develops eco-friendly nanocomposites using waste-derived nanoparticles such as those from used coffee grounds. A key theme across the research is the engineering of functional materials with tailored mechanical, thermal, and transport properties for biomedical and environmental applications.
Figures are computed from collected data and may differ slightly.
The vitrification of a liquid occurs when ice crystal formation is prevented in the cryogenic environment through ultrarapid cooling. In general, vitrification entails a large temperature difference between the liquid and its surrounding medium. In our droplet vitrification experiments, we observed that such vitrification events are accompanied by a Leidenfrost phenomenon, which impedes the heat transfer to cool the liquid, when the liquid droplet comes into direct contact with liquid nitrogen.
Minimizing cell damage throughout the cryopreservation process is critical to enhance the overall outcome. Osmotic shock sustained during the loading and unloading of cryoprotectants (CPAs) is a major source of cell damage during the cryopreservation process. We introduce a microfluidic approach to minimize osmotic shock to cells during cryopreservation. This approach allows us to control the loading and unloading of CPAs in microfluidic channels using diffusion and laminar flow. We provide a th
Abstract Poly(ethylene oxide) nanocomposites filled with functionalized multi‐walled carbon nanotubes are prepared and characterized using rheological and morphological measurements. This study investigates how the surface treatment of carbon nanotubes (CNTs) affects the CNT dispersion state. It is found that the nanocomposites have a higher effective volume fraction than the real volume fraction of the CNTs. The dispersion state of the CNTs is identified by using field emission scanning electro
ABSTRACT This study evaluated physical properties of the nanocomposites reinforced by used coffee grounds. Coffee grounds were ball‐milled and filtered in an effort to secure nanoparticles for the fabrication of polyvinyl alcohol (PVA)/coffee nanocomposites. We analyzed the particle size distribution of coffee particles and investigated mechanical and optical properties of the prepared nanocomposites. Carbon black (CB)‐filled nanocomposites were also prepared to understand the physical behavior
Abstract The Baylis‐Hillman reaction of 2‐cyanobenzaldehyde with some activated alkenes leading to the formation of 3‐oxo‐2,3‐dihydro‐1 H ‐isoindoles has been described.
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