Choi S. – TechConnect Briefs

The distribution of engineered nanoparticles (ENPs) in municipal wastewater treatment systems

Choi S., Eichhorn J., Johnston M., Huang C.P., University of Delaware, US

The objective of this research was to develop a method reliable for the detection and quantification of engineered nanoparticles in municipal wastewater treatment systems. Wastewater and sludge samples were sampled from four regional municipal wastewater [...]

Ultrastructural and mechanical effects of collagen cross-linking treatment on human corneo-scleral tissues

Choi S., Jung G.B., Cheong Y., Shin J.-H., Jin K.-H., Park H.K., Kyung Hee University, KR

The aim of this study was to quantitatively examine the immediate effects of a photooxidative collagen cross-linking treatment with photosensitizer riboflavin and 370 nm UVA light in in vitro rabbit dermal collagen fibrils. These effects [...]

Investigation of Metal Nano Layer Formation by the Tunneling Current through the Thin Oxide Film in the Electrolyte–Oxide–Silicon System

Lee S-H., Cheon J-H, Choi S., Choi Y., Choi S., Choi Y., Park Y.J., Seoul National University, KR

In the researches on Electrolyte–Oxide–Silicon (EOS) system, tunneling current through the gate insulator has been considered as an undesirable factor causing reliability issues such as gate insulator degradation and interface state generation. In this work, [...]

Nanostructural Changes in Surface of Stainless Steel Archwires Combined with Orthodontic Conventional and Self-Ligating Brackets

Choi S., Joo H., Cheong Y., Lee S., Kim S., Park H.K., Park Y.-G., Park H.K., Park Y.-G., Kyung Hee University, KR

It is well-known that the frictional force between the archwire (AW) and the bracket reduces the efficiency of orthodontic treatment. It is affected not only by geometry of self-ligating brackets but also by physical changes [...]

Nanostructural Effects of Mitomycin C Applications on Scleral Collagen Fibrils: Atomic Force Microscopy Observation

Choi S., Cheong Y., Kwon E., Jung G.B., Lee H.J., Shin J.-H., Jin K.-H., Park H.K., Kyung Hee University, KR

This study was to investigate the effects of Mitomycin C on the scleral collagen surfaces by atomic force microscopy (AFM). Two non-contact mode AFM machines were used to observe changes in the morphological characteristics of [...]

Nanoscale structure and property changes in collagen fibrils on the extracorporeal shockwave therapy applications of the rat Achilles tendon injury

Choi S., Lee G.J., Chon J., Chae S.-J., Yoo S.-D., Park H.K., Park J.H., Kim K.S., Park H.K., Park J.H., Kyung Hee University, KR

Extracorporeal shockwave therapy (ESWT) is popular in the treatment of musculo-skeletal injuries. However, the mechanism by which such therapy might have an effect on tendon injury is unknown. The Achilles tendons are mainly composed of [...]

Measurement of Structural and Mechanical Property of Live Mesangial Cell (MC) by Atomic Force Microscopy (AFM)

Lee G.J., Lee S-H., Park E.J., Park H.K., Park J.H., Lee G.J., Lee S-H., Lim J.E., Eo Y.H., Han J.H., Choi S., Park E.J., Park H.K., Park J.H., Shin Y.A., Jin H.S., Hong K.W., Oh B.S., Park E.J., Park H.K., Park J.H., Kyung Hee University, KR

Atomic force microscopy (AFM) has become an important device to visualize various cells and biological materials for non-invasive imaging. The major advantage of AFM compared to the conventional optical and electron microscopes is its convenience. [...]

Growth and Engineering of High Aspect-Ratio AAO Templates Integrated on Silicon Substrates

Choi S., Daugherty M., Enable IPC Corporation, US

We have developed a CMOS-compatible process for manufacturing nanowires directly on silicon (or other) substrates. This process removes some of the steps for conventional nanowire manufacture. The result are highly-ordered, high aspect-ratio nanowires for use [...]

Properties of Self-Assembled Monolayer as an Anti-adhesion Layer on Metallic Nano Stamper

Choi S., Lee N., Kim Y.J., Kang S., Yonsei University, KR

The increasing demand for micro/nano optical components in the fields of optical data storage, optical communication, and digital display has required mass replication of polymeric micro/nano patterns. In nano replication process, surface quality can be [...]

Synthesis of Carbon Nanotubes by Decomposition of Hydrocarbon Using an Arc-Jet Plasma

Choi S., Choi S.S., Nam J.S., Choi S., Choi S.S., Lee C.M., Kim J.I., Hong S.H., Seoul Nationl University, KR

We present a method to produce carbon nanotubes by decomposition of hydrocarbons using an arc-jet plasma of high temperature (500020000 K). Carbon nanotubes are continuously produced in a floating condition by introducing a hydrocarbon gas [...]