A5100462926- HVDC Systems and Fault Protection
- Laser-induced spectroscopy and plasma
- X-ray Spectroscopy and Fluorescence Analysis
- Physics of Superconductivity and Magnetism
- Laser-Plasma Interactions and Diagnostics
- Superconducting Materials and Applications
- Synthesis and biological activity
- Advanced biosensing and bioanalysis techniques
- Inflammatory mediators and NSAID effects
- Click Chemistry and Applications
- Molecular Junctions and Nanostructures
- Quinazolinone synthesis and applications
- Laser Material Processing Techniques
- High-pressure geophysics and materials
- Semiconductor Lasers and Optical Devices
- Synthesis and Characterization of Heterocyclic Compounds
- Semiconductor Quantum Structures and Devices
- Quantum and electron transport phenomena
- Synthesis and Catalytic Reactions
- Ectopic Pregnancy Diagnosis and Management
- Advanced battery technologies research
- Laser-Ablation Synthesis of Nanoparticles
- Fungal Plant Pathogen Control
- Surface Chemistry and Catalysis
- Plant Pathogenic Bacteria Studies
Ulsan National Institute of Science and Technology
2019-2025
Daegu Haany University
2024
Korea Research Institute of Standards and Science
2023-2024
Institute for Basic Science
2014-2023
Sungkyunkwan University
2023
Gwangju Institute of Science and Technology
2017-2021
Pusan National University
2018-2020
Korea University
2018
Kyung Hee University
2014-2015
Catholic University of Korea
2015
In addition to platinum (Pt), many metals (e.g., Ru, Co, Mo, Ni, W, and Fe) their complexes have been explored as catalysts for a hydrogen evolution reaction (HER). Although the position of relatively inexpensive rhenium (Re) on so-called Sabatier plot suggests its usefulness in HER, performance Re have, so far, quite disappointing. The present work describes synthesis characterization clusters comprised nanoparticles held together by an amorphous-carbon phase. Unlike standard HER catalysts,...
Merkel cell carcinoma (MCC) is a rare but aggressive neuroendocrine skin cancer with limited treatment options, often associated polyomavirus (MCPyV) and marked by hypoxic tumor microenvironments that promote resistance to therapies. Belzutifan, an FDA-approved hypoxia-inducible factor-2α (HIF-2α) inhibitor, has shown promise in inhibiting growth; however, its clinical efficacy hindered low solubility, rapid clearance, bioavailability. In this study, we present strategy using porous silicon...
When an organometallic catalyst is tethered onto a nanoparticle and embedded in monolayer of longer ligands terminated "gating" end-groups, these groups can control the access orientation incoming substrates. In this way, nonspecific become enzyme-like: it select only certain substrates from substrate mixtures and, quite remarkably, also preorganize such that some their otherwise equivalent sites react. For simple, copper-based click reaction for gating charged groups, both substrate-...
Cannabinoids are a class of natural products originally isolated from the plant Cannabis sativa , and demand for cannabinoid-derived compounds has continuously grown. Recombinant microorganisms harboring metabolic pathways synthesizing...
Total synthesis of anguibactin was accomplished for the first time, and following biochemical characterizations allowed determination its Fe(III) binding mode as well demonstration iron delivery capability Acinetobacter baumannii. These properties, in addition to thermal stability over acinetobactin, render a competent surrogate siderophore that can be useful future development siderophore-based antibiotic system against A.
Ultrafast optical excitation of matter leads to highly excited states that are far from equilibrium. In this study, femtosecond x-ray absorption spectroscopy was used visualize the ultrafast dynamics in photoexcited warm dense Cu. The rich dynamical features related d vacancies observed on timescales. Despite success explaining data picosecond regime, new poorly understood through traditional two-temperature model based fast thermalization concept and static electronic structure for...
Nanometer-thin self-assembled monolayers on nanoparticles can act akin to solvents and partition small molecules from the surrounding solution according their log P values.
The dynamic diamond anvil cell (dDAC) technique has attracted great interest because it possibly provides a bridge between static and compression studies with fast, repeatable, controllable rates. dDAC can be particularly useful tool to study the pathways kinetics of phase transitions under pressurization if simultaneous measurements physical quantities are possible as function time. We here report development real-time event monitoring (RTEM) system dDAC, which simultaneously record volume,...
Free-electron laser pulse-based X-ray absorption spectroscopy measurements on warm dense copper are presented. The incident pulse energies were measured with a detector assembly consisting of photocathode membrane and microchannel plates, the transmitted simultaneously photodiode detector. precision was evaluated. For foil irradiated by an intense femtosecond pulse, enhanced below L 3 -edge, followed rapid evolution highly excited Fermi liquid within picosecond, successfully measured. This...
Establishing whether a reaction is catalyzed by single-metal catalytic center or cooperatively fleeting complex encompassing two such centers may be an arduous pursuit requiring detailed kinetic, isotopic, and other types of studies─as illustrated, for instance, over decade-long work on single-copper versus di-copper mechanisms the popular "click" reaction. This paper describes method to interrogate cooperative nanoparticle-based platform in which probabilities units being proximal can...
Interferometric correlation spectroscopy is performed to investigate the decoherence dynamics of localized excited states in a single GaAs/AlGaAs quantum ring. For increasing temperature and excitation, we observe that decay interferometric envelope Fourier‐transformed spectrum remain exponential Lorentzian, respectively. The linewidth broadening for excitation intensity can be attributed enhanced acoustic phonon scattering Auger fast modulation limit through barrier traps, where carriers...
We have employed a variable stripe length method in order to measure the optical gain of GaAs/AlGaAs quantum rings. Although large lateral diameter rings (∼50 nm) with few nm size distribution is expected cause small spectral inhomogeneity (∼1%), broad width (∼300 meV) was observed. This result attributed variation vertical heights and variations localized states that exhibit crescent shaped wavefunctions, whereby energy levels are distributed over range. When excitation intensity decreased,...
Abstract This study aimed to meticulously assess the effectiveness of hyaluronic acid (HA) in mitigating symptoms associated with monosodium iodoacetate (MIA)-induced osteoarthritis (OA) rodent models and investigate underlying mechanistic pathways. Eight-week-old rats were randomly allocated a normal control group three experimental groups ( n = 10 per group). The did not undergo any treatment. administered MIA for 1 week induce osteoarthritis, orally distilled water (control group), 2...
<title>Abstract</title> Various metastable ice phases and their complicated transition pathways have been found by pressurization at low temperatures, where slow kinetics high metastability can be easily achieved. In contrast, such diversity is less expected room or elevated temperatures. Here, using a dynamic diamond anvil cell X-ray free electron laser techniques, we demonstrate that supercompressed water transforms into VI through multiple freezing–melting temperature, hidden within the...
YBCO coated conductor called the second-generation superconducting tapes have resistance increase significantly more than BSCCO in terms of speed or amount when quench occurs, they may different ranges application. Such characteristics are thought to get properties by selection stabilizing materials manufacturing tapes. It is important selecting which will be applied power devices future. In this study, one kind and two kinds CC with non were used compare examine transport flux-flow state...