Sogang University – TechConnect Briefs

Thermoelectric temperature sensors by printing with a simple office inkjet printer

Chae H., Jung M., Soum V., Lee J., Kim H., Kim T., Cheong H., Kim H., Kim T., Jeon S., Kwon O-S, Shin K., Sogang University, KR

Recently, printing temperature sensors have been significantly demanded in the paper electronics, such as electronic skin for robots, polymer chain reaction for DNA amplification. Here we present printing thermoelectric temperature sensors by using a simple [...]

Design process to minimize roof surface defect using flexural function computed by finite element method

Hwang S.Y., Jeong H.S., kim N.S., Sogang University, KR

Exterior curvature of the vehicle is one of the most important factors to evaluate the quality of the vehicle. During oven process, exterior of the roof is deformed. However this can be only identified under [...]

Bearing life prediction on the basis of run-out using accelerated life testing coupled with numerical analysis

Lee N.R., Hwang S.Y., Kim N., Sogang University, KR

Wear is one of the most important factors affecting roller bearing performance and in determining bearing life-time. Bearing life has traditionally been defined by the onset of spalling (ISO 281), but this definition does not [...]

FE Simulation of material removal and surface properties for EDM during single and multiple spark occurrences

Lim H.J., Domblesky J.P., Kim N., Hwang S.Y., Sogang University, KR

EDM represents an effective machining process for hard-to-machine materials. Although EDM has many advantages, it lacks well-developed technological base and level of fundamental understanding that characterizes other metal cutting technologies. This has limited the development [...]

Model Study for Thermal Deformation and Creep Behavior of Polymers Considering Moisture Diffusion

An T.G., Lim Y., Kim N., Sogang University, KR

ABS(Acrylonitrile-Butadiene-Styrene) polymer is viscoelastic materials which are subject to permanent deformation when exposed to certain temperatures and humidity levels for long periods of time. In this paper, this phenomenon was defined as a creep phenomenon [...]

Fabrication of Active Digital Microfluidic Paper Chips with Inkjet-printed Patterned Electrodes and their Point-of Care Biomedical Application

Ko H., Lee J., Kim K., Kim Y., Kee Y., Kim K., Kim Y., Jung C-H, Choi J-H, Kwon O-S, Shin K., Sogang University, KR

Active, paper-based, microfluidic chips driven by electrowetting are fabricated by using inkjet printing and demonstrated for reagent transport and mixing. Instead of using the passive capillary force on the pulp to actuate a flow of [...]

Fabrication of ITO/Gold nanoparticle/RGD peptide Composites to Enhance Electrochemical Signals from Human Neural Stem Cells

Kim T-H., Choi J.W., Sogang University, KR

Gold nanoparticles (GNP) and RGD peptide modified indium tin oxide (ITO) electrode was fabricated to enhance the electrochemical signals from neural stem cells (HB1.F3). ITO film is well-known transparent and conductive material suitable for both [...]

Control of Pore Size in Nanoporous Ultralow Dielectrics

Kang I-Y, Song S.H., Rhee H-W, Sogang University, KR

As feature size and metal-to-metal space become smaller, ultralow dielectric materials are required to reduce signal delay and cross talk of interconnect. One of the most promising approach to reduce these problems is the introduction [...]

Simultaneous determination of guanine and adenine on nano-poly(4-aminothiophenol) patterns modified ITO electrode

El-said W.A., Kim T-H., Choi J.W., Sogang University, KR

Here, poly(4-aminothiophenol) nano-patterns modified ITO electrode was fabricated to investigate the electrochemical behavior of A and G individual as well as simultaneous detection of mixture of A and G. The results demonstrated that nano-poly(4-aminothiophenol)/ITO can [...]

Development of Quantitative Adhesive Force Measurement Systems for Flexible Electronics

Kim M., Park J., Choi B., Sogang University, KR

In this paper, a novel adhesive force measurement system is developed to measure adhesive forces from interacting surfaces. In previous paper, the adhesive force was measured with tens/hundreds of uN, and the displacement was measured [...]