Kim H.-J. – TechConnect Briefs

Zn(Ⅱ)-Based Metal-Organic Framework/Nafion® Composite Membrane with High Proton Conductivity for Fuel Cell Applications

Kim H.-J., Kabir L., Kyungpook National University, Daegu 41566, Korea, KR

Metal-organic frameworks (MOFs) can serve as a scaffold to anchor acidic groups and provide efficient proton transfer pathways owing to their highly ordered structures and modular nature. Intentional coordination of MOFs with a conductive polymer [...]

Tuning of Nafion® by HKUST-1 as coordination network to Enhance Proton Conductivity for Fuel Cell Applications

Kim H.-J., Talukdar K., Choi S-J, Kyungpook National University, KR

MOFs have highly ordered structures and modular nature that can serve as a scaffold to anchor acidic groups and improve efficient proton transfer pathways. HKUST-1, a MOF material containing CuII–paddle wheel type nodes and 1,3,5-benzenetricarboxylate [...]

The role of cetyltrimethylammonium bromide in efficiency of organic-quantum dot hybrid solar cell

Heo S.J., Yoon S., Oh S.H., Kim H.-J., Yonsei University, KR

We fabricated high efficiency organic-quantum dot hybrid solar cells. By employing the hybrid active layer, which absorbed the light in wide range, the short circuit current (Jsc) is increased due to a multiple exciton generation [...]

The role of cetyltrimethylammonium bromide in efficiency of organic-quantum dot hybrid solar cell

Heo S.J., Yoon S., Oh S.H., Kim H.-J., Yonsei University, KR

We fabricated high efficiency organic-quantum dot hybrid solar cells. By employing the hybrid active layer, which absorbed the light in wide range, the short circuit current (Jsc) is increased due to a multiple exciton generation [...]

The Effect of Various Binder Additions on the Magnetic Properties of Soft Magnetic P/M Cores

Kim H.-J., Kim K.S., Kim S.I., Kim H.-J., Kim K.S., Kim S.I., Song J-J, Yoon S.C., Kim H.-J., Kim K.S., Kim S.I., Inje University, KR

Recently, there has been a growing demand for soft magnetic materials used in miniaturized electromagnetic devices with high performance, which can be used at a high frequency range. These applications include Switch Moded Power Supply, [...]

Ion Characteristics and Electrostatic Removal of Ultrafine Particles in High Temperature CO2 Enriched Conditions

Han B., Kim H.-J., Kim Y.J., Song D.-K., Hong W.-S., Shin W.-H., Jeong S.-H., Kim H.-J., Kim Y.J., Korea Institute of Machninery and Materials, KR

Ion current and ion mobility have been investigated at different CO2 fractions and temperatures and electrostatic collection in a wire-plate electrostatic precipitator (ESP) has been also investigated and discussed based on ionic properties. Higher CO2 [...]

Development of A Novel Electrostatic Precipitator Using Carbon fiber Unipolar Ionizers and Dielectric Collection Plates and Its Removal of Ultrafine Particles

Kim H.-J., Kim Y.J., Han B., Oh W.S., Oda T., Kim H.-J., Kim Y.J., Korea Institute of Machinery and Materials, KR

Current electrostatic precipitators (ESPs) for removing particles from semiconductor industries have used costly anti-corrosive metallic materials to maintain the particle removal performance. Due to the economical demand of the industries, a novel ESP has been [...]

Novel Mycotoxin Collection System using Magnetic Nanoparticles for Determination of Aflatoxin B1 and Zearalenone in Feed

Cha S-H, Lee J-K, Jung H-S, Kim H.-J., Kim S-H, Kim H.-J., Kim S-H, Choi C-U, Kang H-G, National Veternary Research and Quarantine Service, KR

Introduction: A common method for determination of mycotoxins contaminated in feeds combines immunoaffinity chromatography (IAC) and high-performance liquid chromatography (HPLC) with UV detection1,2. However, the IAC method to collect mycotoxins is expensive and time-consuming. Moreover, [...]

In Vitro and In Vivo Evaluations of Bioactive Poly(epsilon-caprolactone)–Organosiloxane Nano-Hybrid Developed as a Novel Bone Substitute

Yoo J.J., Kim H.-J., Rhee S-H., Seoul National University College of Medicine, KR

In this study, we evaluated the cellular behaviors of human bone marrow stromal cells (hBMSCs) on the surface of apatite pre-coated poly( -caprolactone)–organosiloxane nano-hybrid material (SiOPCL) and assessed the osteoconductivity of SiOPCL in the diaphyses [...]

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 [...]