Seoul National University – Page 5

Ultra-thin Nanocomposite Membranes for Highly Sensitive Sensors

Kang T.J., Jang E.Y., Lee J-H., Kim Y.H., Seoul National University, KR

Highly sensitive sensor arrays are critical for prospective devices and demanded for various applications. Measuring microscopic deflections with sensitive membranes is one of the most versatile approaches for pressure, acoustic, chemical and biomolecular sensing. Here [...]

Genetic Algorithm for the Design of Microchip Flow Cytometers

Bang H., Lee W.G., Yun H., Min J.K., Chung C., Chang J.K., Han D-C, Seoul National University, KR

Robot designers and artificial-intelligence researchers have long been inspired by living things. Now, we are trying to mimic some of the most fundamental features of life while designing micro devices. In this paper we proved [...]

Characterization on Dioxin Emission of TiO2 Nanoparticle-Encapsulating Poly(vinyl chloride) (TEPVC) compared to conventional PVC

Yoo H., Kim S-H, Lee A.R., Kwak S-Y, Seoul National University, KR

In our previous study, we first prepared TiO2 nanoparticle-encapsulating poly(vinyl chloride) (TEPVC) aiming at breakthrough to enhance the dispersibility of TiO2 nanoparticles in PVC matrix to maximize catalytic activities of TiO2 nanoparticles. The present study [...]

Silver Particle and Silver Thiolate-Based Molecular Sensing/Recognition Units Operating via Surface-Enhanced Raman Scattering

Kim K., Kim N.H., Park H.K., Kim K., Kim N.H., Lee H.S., Lee Y.M., Lee H.S., Lee Y.M., Seoul National University, KR

Noble metallic nanostructures exhibit a phenomenon known as surface-enhanced Raman scattering (SERS) in which the scattering cross sections are dramatically enhanced for molecules adsorbed thereon. We demonstrate that commercially available Ag(μAg) powders can be used [...]

In Situ Investigation of Uptake Phenomena of Biological Molecules and Silica Nanoparticles into Mammalian Cells in Microstructures

Lee W.G., Bang H., Yun H., Kim J.A., Cho K., Shin Y.S., Chung C., Chung N.C., Chung C., Chung N.C., Chang J.K., Han D-C, Seoul National University, KR

Electroporation is a powerful gene transfection method to deliver foreign biological molecules such as DNA and protein into living cells with electric pulsations. However, conventional cuvette-type electroporation techniques generally suffer from poor transfection efficiency and [...]

Novel Supramolecules Based on Architecturally Variant alpha-Cyclodextrin Polyrotaxanes and Nanorod-Like alpha-Cyclodextrin Self-Assembly

Chung J.W., Yu B.-Y., Kwak S-Y, Seoul National University, KR

Self-assembly (SA-ICs) of architecturally variant alpha-cyclodextrin (alpha-CD) inclusion complexes (ICs) formed by host-guest reaction with four polymeric guest having different molecular architectures (star-shaped, hyperbranched, diblocked, and linear polymer) and nanorod-like self-assembly (SA-CD) of alpha-CD could [...]

Active Sealing for Soft Poymer Microchips

Bang H., Lee J., Lee W.G., Park J., Yun H., Lee J., Lee W.G., Chung C., Chung S., Cho K., Chung C., Chung S., Han D-C, Chang J.K., Seoul National University, KR

This paper presents a universal sealing method for soft polymer (elastomer) microchips. A robust and reversible sealing method which allows various materials to be bonded and sealed tightly with each other even in aqueous solutions, [...]

CNT-Array Integrated SoC for Biological Sensor Applications

Seo S.M., Cheon J-H, Lee B-Y, Lee J-H., Lee M., Lee B-Y, Lee J-H., Lee M., Im J., Lee B-Y, Lee J-H., Lee M., Chung I-Y, Hong S., Park Y.J., Min H.S., Seoul National University, KR

8x8 carbon nanotube (CNT) arrays are integrated on top of the CMOS chip. The CNTs are functionalized to detect the target ions, and the I-V characteristics are altered by the bio-chemical reaction. The sensing circuit [...]

Field emission characteristics of carbon nanofibers grown on the electroplated copper micro-tips

Sung W-Y, Kim W-J, Kim Y.H., Lee H.Y., Lee S.M., Yoo H-S, Lee H.Y., Lee S.M., Joo S-K, Kim W-J, Kim Y.H., Seoul National University, KR

Carbon nanofibers (CNFs) were synthesized on micro-copper tips by using direct current plasma enhanced chemical vapor deposition of C2H2 and NH3 gas at 480℃. The copper micro-tips were uniformly formed by high current electroplating and [...]

Intelligent Digital 3-Axis IMU for Automotive and Robotic Applications

Ko H., Park S., Park Y., Choi B-D, Park S., Park Y., Song T., Lim G., Yoo K., Lee A., Lee S-C, Lee S., Lww S.C., Lee A., Lee S-C, Lee S., Lee A., Lee S-C, Lee S., Cho D-I, Choi B-D, Seoul National University, KR

This paper presents the intelligent digital 3-axis IMU (inertial measurement unit) system. The MEMS accelerometer and gyroscope sensing cores are fabricated by using the SBM (Sacrificial Bulk Micromachining) process. The fabricated sensing cores accomplish the [...]