A5101886695- Advancements in Solid Oxide Fuel Cells
- Fuel Cells and Related Materials
- Electronic and Structural Properties of Oxides
- Catalysis and Oxidation Reactions
- Advanced battery technologies research
- Microwave Dielectric Ceramics Synthesis
- Ferroelectric and Piezoelectric Materials
- Ultrasound and Cavitation Phenomena
- Thermal Expansion and Ionic Conductivity
- Chemical Looping and Thermochemical Processes
- Electrocatalysts for Energy Conversion
- Advanced oxidation water treatment
- Glass properties and applications
- Advanced Memory and Neural Computing
- Multiferroics and related materials
- Catalytic Processes in Materials Science
- Pharmaceutical and Antibiotic Environmental Impacts
- Neuroscience and Neural Engineering
- Aluminum Alloys Composites Properties
- Intermetallics and Advanced Alloy Properties
- Pickering emulsions and particle stabilization
- African Botany and Ecology Studies
- Phytoestrogen effects and research
- Bee Products Chemical Analysis
- Advanced Condensed Matter Physics
Myongji University
2015-2024
Republic of Korea Army
2011
University of Pennsylvania
2011
Korea Institute of Science and Technology
2008-2010
Seoul National University
1997-2007
Artificial synaptic potentiation and depression characteristics were demonstrated with Pt/CeO2/Pt devices exhibiting polarity-dependent analog memristive switching. The strong sequential resistance change its maximum to minimum ratio >105, imperatively essential for stable operation, as repeating voltage application, emulated the motion of a synapse variable weight. weight could be controlled by amplitude, width, number repeated pulses. asymmetric current–voltage consequential are thought...
The physical and microstructural properties of NiO‐ Ni‐YSZ composite thin films deposited by pulsed‐laser deposition have been investigated for nanoporous anode electrodes SOFC applications. An NiO‐YSZ film which was at room temperature postannealed 700°C exhibited a fine porous structure, but electrical conduction not detected when reduced. On the other hand, 700°C‐deposited showed appropriate crystallinity conductivity after reduction; however, massive Ni agglomeration occurred structures...
Capillary suspensions are ternary solid-liquid-liquid systems produced via the addition of a small amount secondary fluid to bulk that contained dispersed solid particles. The could exert strong capillary forces between particles and dramatically change rheological properties suspension. So far, research has focused on consist additive-free fluids, whereas with additives, particularly those large molecular weight highly relevant for industrial purposes, have been relatively less studied. In...
A synaptic transistor emulating the biological motion is demonstrated using memcapacitance characteristics in a Pt/HfOx/n-indium-gallium-zinc-oxide (IGZO) memcapacitor. First, metal-oxide-semiconductor (MOS) capacitor with Pt/HfOx/n-IGZO structure exhibits analog, polarity-dependent, and reversible capacitance-voltage (C-V), capacitance-time (C-t), voltage-pulse measurements. When positive voltage applied repeatedly to Pt electrode, accumulation capacitance increases gradually sequentially....
This study examined the relative degradation of commonly known endocrine-disrupting compounds (EDCs) such as bisphenol A (BPA), 17β-estradiol (E2), and 17α-ethinyl estradiol (EE2) in single-component aqueous solution using 28, 580, 1,000 kHz ultrasonic reactors. The EDCs follows a pseudo-first order rate kinetics; is EE2 ≥ BPA > E2. At different frequencies, these 580 (92–97%) (90–94%) 28 (62–67%) at an initial concentration 1 μM each compound with contact time 30 min. Additional experiments...
Ag/CeO2(~45 nm)/Pt devices exhibited forming-free bipolar resistive switching with a large memory window (low-resistance-state (LRS)/high-resistance-state (HRS) ratio >106) at low voltage ( 104) pulse operation (±5 V, 50 μs). The high oxygen ionic conductivity of the CeO2 layer as well migration silver facilitated formation filament for transition to LRS without forming operation. Also, certain amount defects in was required stable HRS space-charge-limited-conduction, which confirmed...
An approach to select appropriate network modifiers tailor the thermal and dielectric properties of zinc borosilicate (ZBS) glass has been explored apply composition a layer plasma display panels. Based on ionic field strength polarizability corresponding crystalline form, Bi 2 O 3 Na have selected modify toward required for application (440< T g <460°C, 7.5 × 10 −6 <CTE<8.5 /K, 10< K <15). addition ZBS could meet all simultaneously at given range (8.5–14 mol%), while not...