A5101452460- Advancements in Solid Oxide Fuel Cells
- Plasma Diagnostics and Applications
- Electrocatalysts for Energy Conversion
- Semiconductor materials and devices
- Catalytic Processes in Materials Science
- Electrostatic Discharge in Electronics
- Metal and Thin Film Mechanics
- Fuel Cells and Related Materials
- Sulfur Compounds in Biology
- Advanced Chemical Sensor Technologies
- Electronic and Structural Properties of Oxides
- Radio Frequency Integrated Circuit Design
- Copper Interconnects and Reliability
- Graphene research and applications
- Dust and Plasma Wave Phenomena
- Electromagnetic Compatibility and Noise Suppression
- Ferroelectric and Negative Capacitance Devices
- Groundwater and Watershed Analysis
- Diamond and Carbon-based Materials Research
- Nuclear Materials and Properties
- Radioactive element chemistry and processing
- Electrohydrodynamics and Fluid Dynamics
- Ecology and Conservation Studies
- Photosynthetic Processes and Mechanisms
- Porphyrin and Phthalocyanine Chemistry
Seoul National University of Science and Technology
2021-2024
Yonsei University
2023-2024
Gwangju Institute of Science and Technology
2023
University of California, San Diego
2023
National University
2023
Pohang University of Science and Technology
2023
Nanyang Technological University
2023
Pusan National University
2020-2022
The oxygen evolution reaction (OER) is a significant contributor to the cell overpotential in solid oxide electrolyzer cells (SOECs). Although noble metals such as Ru and Ir have been utilized OER catalysts, their widespread application SOECs hindered by high cost limited availability. In this study, we present highly effective approach enhance air electrode performance durability depositing an ultrathin layer of metallic Ru, thin ∼7.5 Å, onto (La0.6Sr0.4)0.95Co0.2Fe0.8O3-δ (LSCF) using...
Interest in securing energy production channels from renewable sources is higher than ever due to the daily observation of impacts climate change. A key harvesting strategy achieving carbon neutral cycles artificial photosynthesis. Solar-to-fuel routes thus far relied on elaborately crafted semiconductors, undermining cost-efficiency system. Furthermore, fuels produced required separation prior utilization. As an photosynthesis design, here we demonstrate conversion swimming green algae into...
A 24-GHz direct-conversion transmitter is proposed for in-cabin radar applications. The RF consists of an I/Q up-conversion mixer, local (LO) oscillator generator, and a power amplifier. To improve the linearity inverter transconductor with third-order intermodulation (IM3) distortion cancellation proposed. balancing performance LO poly-phase filter, including parasitic line inductance, By employing highly linear mixer balanced achieves high characteristics. It fabricated in 65-nm CMOS...
In the semiconductor industry, electrode of a capacitively coupled plasma deposition reactor is often heated with aim process optimization. Based on chemical kinetics, can modulate film properties or enhance growth rates deposited thin films. Because source gas undergoes rapid expansion in hotter region near electrode, responsible for lowering density corresponding sheath. Thus, spatial variations kinetic parameters such as electron energy probability functions (EEPFs), ion distribution...
Abstract In capacitively coupled plasmas (CCPs) operated under various pressure conditions in semiconductor manufacturing processes, the transition discharge characteristics is observed depending on local or nonlocal electron kinetics. A two‐dimensional (2D) particle‐in‐cell (PIC) simulation required because one‐dimensional PIC method cannot capture effect of device structures and fluid models treat self‐consistent change energy distributions. Using a 2D parallelized with graphics processing...
A fluorous-tagging strategy was introduced for the development of fluorescent probes, resulting quantitative and selective detection H 2 S, even in turbid dyeing solutions, using fluorous solid-phase extraction.
Solid oxide cells (SOCs) are electrochemical devices that have garnered significant attention due to their high efficiency, fuel flexibility, and reversibility for operation in both cell the electrolysis modes. However, relatively operating temperature (typically > 800 °C) required presents various challenges such as fast degradation, costs, slow start-up. To overcome these issues, efforts been made decrease temperature, but this causes a dramatic performance low catalytic activity of...
We report the synthesis and characterization of an iron(III)-hydroperoxo complex generated from salicylate-assisted dioxygen activation by a cation-liganded iron(II) complex. Spectroscopic theoretical data revealed stabilization end-on hydroperoxo ligand, mechanistic insights, including "V-shaped" Hammett plot, were confirmed conducting oxygen atom transfer proton-coupled electron reactions.
Reversible solid oxide cells (rSOCs) are crucial energy devices in sustainable systems, offering efficient conversion and storage solutions through hydrogen. Conventional SOFC/SOEC operating temperatures above 700°C; at these temperatures, the benefit from high efficiencies due to facilitated electrochemical reactions effective waste heat utilization. Despite their advantages, commercial rSOCs face hurdles including suboptimal performance intermediate temperature range of 500-700°C, limited...
Abstract The deposition of high‐quality dielectric films on graphene surfaces is crucial in fabricating high‐performance graphene‐based electronics. In this study, the first application UV‐assisted atomic layer (UV‐ALD) to and fabrication field‐effect transistors (GFETs) with UV‐ALD Al 2 O 3 thin demonstrated. Optimal UV irradiation (5 s per cycle) during ALD process results denser smoother deposited surface intimate graphene‐dielectric interface, while excessive turn prohibits film...
Solid oxide fuel cell is a next generation energy conversion device that can efficiently convert the chemical of into electrical energy. Fuel flexibility one advantages SOFCs over other types cells. operate with hydrocarbon type fuel. While nickel based composite commonly used in direct methane fueled SOFC anode because its great catalytic activity for reforming, use fuels pure Ni usually insufficient facile kinetics, and also deactivates carbon deposition upon prolonged operation. In this...
Graphene Field Effect Transistors In article number 2300074 Jeong Woo Shin, Jihwan An, and co-workers show the application of ultra-violet light-assisted atomic layer deposition (UV-ALD) to effectively functionalize graphene surfaces fabricate high-performance field effect transistors (GFETs). The GFET with an UV-ALD Al2O3 dielectric shows a low Dirac voltage high hole mobility that is 3 times improved compared those by thermal ALD. A quality interface between 2D material deposited thin film...
Abstract Ru is extensively used in electrical and energy applications because of its high conductivity catalytic activity. This study reports the H 2 plasma-enhanced atomic layer deposition (PEALD) thin films using a novel carbonyl cyclohexadiene ruthenium precursor. The optimized process conditions for depositing by PEALD were established based on growth per cycle (GPC), chemical formation, crystallinity, conformality, resistivity, according to parameters such as precursor pulse time,...