KR – Page 39 – TechConnect Briefs

Recovery of Caustic Soda in Textile Mercerization by Combined Membrane Filtration

Yang J., Park C., Lee D., Kim S., Korea Institute of Industrial Technology(KITECH), KR

This study is intended to find the optimum operational condition for the recovery of caustic soda solution from mercerization in textile process. As parameters, the silt density index (SDI) evaluation for the application of ceramic [...]

Numerical Simulation of NIL Process Based on Continuum hypothesis

Kim S.M., Woo Y.S., Lee D.E., Lee W.I., Lee D.E., Lee W.I., Seoul Nat'l Univ., KR

Nano imprint lithography(NIL) is a cost-efficient, high-throughput processing technique to transfer nano-scale patterns onto thin polymer films. Polymers used as the resist include UV cured resins as well as thermoplastics such as polymethyl-methacrylate(PMMA). In this [...]

Single dot luminescence characteristics of CdSe/ZnS core-shell structured quantum dots with different ligands

Yu H., Song N.W., Moon D.W., Shin S.K., Korea Research Institute of Standards and Science, KR

Chemical derivatizations with different ligands were perfomed on CdSe/ZnS core-shell quantum dots (QDs). The role of ligands serves to increase water solubility and bio-compatibility of QDs for in-vivo biomedical fluorescence imaging. These QDs were synthesized [...]

New process for fabrication of microcomponents using metal nanopowder

Lee H.M., Choi C-J, Korea Institute of Machinery and Materials, KR

We developed a new process to manufacture a soft mould for the small parts using two kinds of polymer, SU-8 for a master mould and Polydimethylsiloxane (PDMS) for a soft mould and produced the small [...]

Fabrication of microcomponent using Fe based nanopowders

Choi C-J, Lee H.M., Korea Institute of Machinery and Materials, KR

The metallic microcomponents were fabricated by pressureless sintering of nano-sized pure Fe and 17-4 PH stainless steel nanopowders. The compacting and sintering behaviors of nanosized Fe powders have been evaluated and compared with those of [...]

Experiments on removing nano particles on a substrate using a supersonic particle beam

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

Cryogenic particle beam can be an effective means of removing nano-sized contaminant particles from a substrate surface. In order to generate a particle beam of high intensity and controlled size and temperature, Argon gas was [...]

Mesoporous Titanium Dioxide Sphere with Anatase-Type Crystalline Structure using Cyclodextrin as Templates for Nano-sized Pore with Narrow Size Distribution

Chung J.W., Kim H.-J., Kwak S-Y, Seoul National University, KR

Mesoporous titanium dioxide (CD-TiO2) sphere with pore diameter in several nanometers and narrow pore size distribution was prepared from beta-cyclodextrin (beta-CD) and titanium precursor via sol-gel reaction in aqueous acidic condition. beta-CD was used as [...]

Prevention of Coalescence Stage from Nuclei at Initial Growth of Thin Film by Substrate Rotation in Physical Vapour Deposition

Koh S.K., Lee J-H., Han Y.G., Cho J-S, Joo J.H., Kralkina E.A., P&I Corp., KR

A method of nanoparticle fabrication in physical vapor deposition was introduced. Metal were deposited on the powdery substrate which were stirred by rotors. Particle size and prodcuction rate of metal nano particles were controlled by [...]

Organic-Inorganic Hybrid Sun Blocking Powders Based on Polysilsesquioxane

Kim Y.B., Yoon K-S, PaiChai University, KR

Trialkoxyorganosilanes containing p-methoxybenzoyl group were sybthesized and polymerized in shapes of spheres. The resulting spherical powder had narrow size distributions and showed promising characteristics as organic-inorganic hybrid UV blocking agents. Regardless of the sizes of [...]

Preparation and characterization of release behavior for hydrophilic drug loaded alginate nanohydrogels

Lee H.Y., Lee S.M., Lee H.Y., Lee S.M., Kim M.K., Kim Y.M., Kim M.K., Kim Y.M., Sohn S-O, Ghim H-D, Kyungpook National University, KR

Recently, there have been considerable interests in developing biodegradable nanoparticles as effective drug delivery devices. Alginate is one of the hydrophilic natural polymers having biodegradability and biocompatibility. It has possibility to apply in the controlled [...]