KR – Page 40 – TechConnect Briefs

Condensation and Evaporation of a Nano-sized Particle Moving in a Fluid Environment

Yi M-Y, Lee J.W., Lee M.J., Lee J.W., Lee M.J., Pohang University of Science and Technology, KR

Condensation and evaporation of a low temperature nano-sized argon particle moving in a gas/vapor environment was analyzed using the molecular dynamics simulation. First evaporation temperature for various heating rates was found and successfully compared with [...]

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 [...]

Synthesis and characterization of a highly cross linked PEGME and PEG for solid electrolyte and its application in dye-sensitized solar cells

Shaheer Akhtar M., Chun J-M, Lee H-C, Kim K-J, Yang O-B, Chnonbuk National University, KR

The replacement of liquid electrolyte in dye sensitized solar cells by gel and solid electrolyte is one approach towards the improvement of properties of electrolyte such as leakage and evaporation of liquid to operate for [...]

Preparation and Characterization of Nafion/Microporous Titanosilicate Composite Membranes as Ion-Conducting Materials

Ryu S.-Y., Jeon J-D, Kwak S-Y, Seoul National Univesity, KR

Nafion is currently the most frequently used polymeric electrolyte in membranes for many fuel cell applications. Direct methanol fuel cells this electrolyte membrane are currently being considered as a desirable electrochemical power source in potable [...]

Characterization of Nanaoporous Low-Dielectric Constant SiCOH Films using Organosilane Precursor

Heo K., Park S.-G., Yoon J., Jin K.S., Jin S., Jin K.S., Jin S., Rhee S.W., Ree M., Pohang University of Science and Technology, KR

The grazing incidence small-angle X-ray scattering (GISAXS) and X-ray reflectivity (XR) analysis were performed to investigate the nanoporous structure of low dielectric constant carbon-doped silicon oxide (SiCOH) films, which were deposited with plasma enhanced chemical [...]

Synchrotron X-Ray Scattering Studies of Star-Shape Polymers

Jin K.S., Jin S., Higashihara T., Jin K.S., Jin S., Yoon J., Heo K., Kim J., Kim K.W., Kim J., Kim K.W., Hirao A., Ree M., Pohang University of Science and Technology, KR

The physical properties of well-defined star-shape polystyrenes with high number of arms (6 to 57 arms) in good and theta solvents were studied using synchrotron X-ray scattering. The scattering profiles for multi-armed polystyrenes shown the [...]

Quantitative Synchrotron Grazing Incidence X-ray Scattering Analysis of Cylindrical Nanostructure in Supported Thin Films

Yoon J., Yang S.-Y., Lee B., Joo W.-C., Heo K., Kim J.K., Ree M., Pohang University of Science and Technology, KR

Grazing incidence X-ray scattering (GIXS) has emerged as a powerful technique for characterizing internal structure of hin film. The X-ray beam impinges at a grazing angle onto the sample slightly above the critical angle, so [...]

Determination of micro-structural properties with x-ray absorption fine structure

Han S.-W., Park S.H., Yu H.-J., Jeong E.-S., Kim S-H, Kim Y.J., Kim S-H, Kim Y.J., Yi G.-C., Chonbuk National University, KR

We studied the structural properties of ZnO nanostructures with x-ray absorption fine structure (XAFS) to understand the growth mechanism of vertically aligned ZnO nanorods of the average diameter of 50 - 150 nm. The orientation-dependent [...]

Quantitative Synchrotron Grazing Incidence X-ray Scattering and Reflectivity Analysis of Nano-structures and Patterns Supported with Substrates

Ree M., Yoon J., Heo K., Jin K.S., Jin S., Jin K.S., Jin S., Lee B., Park I., Park Y.H., Choi S.C., Kim G., Kim H., Kim J-S, Kim J., Kim K.W., Kim G., Kim H., Kim J-S, Kim J., Kim K.W., Oh W., Park I., Park Y.H., Hwang Y., Kim G., Kim H., Kim J-S, Kim J., Kim K.W., Kim G., Kim H., Kim J-S, Kim J., Kim K.W., Kim G., Kim H., Kim J-S, Kim J., Kim K.W., Chang T., Pohang University of Science & Technology, KR

Single-layer, multi-layer, and patterned nanostructures were fabricated with aids of substrates from various material systems (polymers, diblock copolymers, polymer blends, alumina precursors, silane precursor, etc.) using wet spin-coating and subsequent dry and thermal process, chemical [...]

Fabrication and Application in Microfluidics of Novel Transparent Preceramic Polymer Derived Glass Microcannels and Substrates

Kim D-P, Park J.H., Perumal J., Chungnam National University, KR

Generally, glass-based microfluidics with the chemical inertness and thermal stability have widely used, while plastics including PDMS have showed their convenience in fabricating microfluidic devices. Therefore, one can simply anticipate that it must be desirable [...]