Lee S-H. – TechConnect Briefs

Magnetic properties of ceramic composite using melt process

Lee S-H., Sunmoon University, KR

The critical transition temperature and critical current density of YBaCuO single crystal bulk were measured after heat diffusion treatment in nano powder. The superconducting start temperature was found to high at 91.62K. It can be [...]

Effect of Porosity on Specific Resistance of Inkjet-Printed Silver Nanoparticles during Laser Sintering

Moon S.J., Moon Y.J., Kang H., Kang K., Kang H., Kang K., Lee S-H., Hwang J.Y., Moon S.J., Moon Y.J., Korea Institue of Industrial Technology, KR

In nano-metal sintering, the electrical resistivity of nano-metals is related to their structure. Electrical resistivity is affected by grain size and density. Larger grains and denser films yield lower electrical resistivity. This work investigated the [...]

Reliability Evaluation of Inkjet-Printed Silver Patterns for Application to Printed Circuit Board

Shin K.-Y., Kang H.S., Kang K.T., Kang H.S., Kang K.T., Hwang J.Y., Lee S-H., Kim J-M, Korea Institute of Industrial Technology, KR

Recently, several studies on the reliability of inkjet-printed patterns have been conducted to evaluate inkjet printing technology as a fabrication process for the printed circuit board industry. However, the methods and standards for evaluating the [...]

Converting Dimensions: A Facile and High-Yield Route for Getting Sub-100 nm Silicon Nanowires

Lee S-H., Yonsei University, KR

For synthesizing uniform sub-100-nm Si nanowires (NWs), we introduce a metal-assisted chemical etching (MCE)-based facile and high-yield route, employing simple thermal annealing and vacuum deposition processes. Under rapid thermal annealing, an ultrathin Ag film on [...]

Efficiency of a Flat-plate Solar Collector with Water-based MWCNT Nanofluids

Lee S-H., Jang S.P., Korea Aerospace University, KR

In this paper, the efficiency of nanofluid-based flat-plate solar collector is analytically evaluated by use of the extinction coefficient of nanofluids. The water-based multi wall carbon nanotube (MWCNT) nanofluids and water-based Ag nanofluids are selected [...]

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, [...]

The Effect of Surface Treatment on The Line Formation of Inkjet-Printed Silver Nanoparticles

Moon S.J., Moon Y.J., Kang H.S., Kang K.T., Kang H.S., Kang K.T., Lee S-H., Moon S.J., Moon Y.J., Hwang J.Y., Korea Institute of Industrial Technology(KITECH), KR

Printing technologies have emerged as a promising technique to realize low-cost integrated circuits. Among several printing techniques, drop-on-demand inkjet printing is an attractive tool for low-cost electronics fabrication. Inkjet printing can generate patterns of metal, [...]

Micro Patterning of Organic Solvents on OLED Device Using EHD Inkjet Technology

Lee S-H., Nguyen X.H., Jo W., Ko H.S., Sungkyunkwan University, KR

Although there are many modes of the ejection mechanism from the EHD nozzle [2], a cone-jet mode, a pulse-jet mode and a micro-dripping mode have been analyzed by capturing the jetting phenomena using organic solvents [...]

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. [...]

200um-class Polymeric Microneedle Fabricated by a Micro Injection Molding Technique

Kang J-J, Lee S-H., Jung T-S, Heo Y-M, Korea Institute of Industrial Technology, KR

Extensive microneedle research has been conducted to enhance the efficiency of transdermal drug delivery. It has been expected and shown through experiments in vivo that microneedles can increase the skin permeability to deliver drugs by [...]