A5101771881- Luminescence Properties of Advanced Materials
- ZnO doping and properties
- Gas Sensing Nanomaterials and Sensors
- Advanced Photocatalysis Techniques
- Ga2O3 and related materials
- Copper-based nanomaterials and applications
- Semiconductor materials and devices
- Electronic and Structural Properties of Oxides
- Advancements in Battery Materials
- Ferroelectric and Piezoelectric Materials
- Microwave Dielectric Ceramics Synthesis
- Advanced Battery Materials and Technologies
- Multiferroics and related materials
- Transition Metal Oxide Nanomaterials
- Perovskite Materials and Applications
- Radiation Detection and Scintillator Technologies
- Magnetic and transport properties of perovskites and related materials
- Graphene research and applications
- Advanced battery technologies research
- Catalytic Processes in Materials Science
- Electrocatalysts for Energy Conversion
- Advanced Condensed Matter Physics
- Supercapacitor Materials and Fabrication
- Quantum Dots Synthesis And Properties
- Advanced Sensor and Energy Harvesting Materials
Korea Basic Science Institute
2016-2025
Pusan National University
2011-2021
Government of the Republic of Korea
2018-2021
University of Ulsan
2018
Ulsan National Institute of Science and Technology
2018
University of Science and Technology Bannu
2018
Islamia College University
2018
Ajou University
2016
Korea Maritime and Ocean University
2011-2015
Andong National University
2011-2015
An urgent need in chemodynamic therapy (CDT) is to achieve high Fenton catalytic efficiency at small doses of CDT agents. However, simple general promotion the reaction increases risk damaging normal cells along with cancer cells. Therefore, a tailored strategy selectively enhance reactivity tumors, for example, by taking advantage characteristics tumor microenvironment (TME), demand. Herein, heterogeneous system based on copper–iron peroxide nanoparticles (CFp NPs) designed TME-mediated...
This paper reports highly bright and efficient CsPbBr3 perovskite light-emitting diodes (PeLEDs) fabricated by simple one-step spin-coating of uniform polycrystalline layers on a self-organized buffer hole injection layer stoichiometry-controlled precursor solutions with an optimized concentration. The PeLEDs have maximum current efficiency 5.39 cd A-1 luminance 13752 m-2 . also investigates the origin hysteresis, which can be ascribed to migration Br- anions. Temperature dependence...
Control of structure and morphology in electrode design is crucial for creating efficient transport pathways ions electrons high-performance energy storage devices. Here we report the fabrication anode materials lithium-ion batteries based on a 3D heterostructured architecture consisting Co3O4 nanoparticles deposited onto porous graphene surfaces. A combination replication filtration processes – simple general method allows direct assembly 2D sheets into films with large surface area,...
Abstract Copper electrodes with a micromesh/nanomesh structure were fabricated on polyimide substrate using UV lithography and wet etching to produce flexible transparent conducting (TCEs). Well-defined mesh realized through the use of high-quality Cu thin films. The films radio-frequency (RF) sputtering single-crystal target—a simple but innovative approach that overcame low oxidation resistance ordinary Cu. Hybrid by adding capping layer either ZnO or Al-doped ZnO. sheet transmittance...
This article proposes a new electrolyte engineering strategy with “zwitterion” molecules, which reduce side reactions by adsorbing onto the zinc surface. The 6-aminohexanoic acid enables uniform deposition and reduces dendrite growth.
A cost-effective and environmentally friendly approach is proposed for producing N- S-codoped multicolor-emission carbon dots (N- MCDs) at a mild reaction temperature (150 °C) relatively short time (3 h). In this process, adenine sulfate acts as novel precursor doping agent, effectively reacting with other reagents such citric acid, para-aminosalicylic ortho-phenylenediamine, even during solvent-free pyrolysis. The distinctive structures of lead to the increased amount graphitic nitrogen...
Abstract As an alternative to Li‐ion batteries, aqueous Zn batteries have gained attention due the abundance of metal, low reduction potential (–0.76 V vs. standard hydrogen electrode), and high theoretical capacity (820 mAh g –1 ) multivalent 2+ ion. However, growth dendrites formation irreversible surface reaction byproducts pose challenges for ensuring a long battery lifespan commercialization. Herein, Cu foil coated with single‐walled carbon nanotube (SWCNT) layer using facile doctor...
Cement is one of the most widely used structural materials and serves as primary component concrete. Among various types, Portland cement commonly utilized due to its excellent strength corrosion resistance. Recently, efforts have been made incorporate functional additives into impart new properties; however, studies on resulting changes in resistance remain insufficient. While existing research has largely focused impurities cement, systematic effects interstitial elements crystallization...
We have fabricated K0.5Na0.5NbO3 (KNN) thin films on Pt substrates by a chemical solution deposition method and investigated the effect of K Na excess (0–30 mol%) ferroelectric piezoelectric properties KNN film. It was found that with increasing in precursor from 0 to 30 mol%, leakage current were strongly affected. film synthesized using 20 mol% exhibited low density well saturated P–E hysteresis loops. Moreover, optimized had good fatigue resistance constant 40 pm V−1, which is comparable...
The electronic structure of a strongly correlated SrRuO<sub>3</sub>epitaxial thin film influences the electrocatalytic activity significantly.
Eu2+-activated M5(PO4)3X (M = Ca, Sr, Ba; X F, Cl, Br) compounds providing different alkaline-earth metal and halide ions were successfully synthesized characterized. The emission peak maxima of the M5(PO4)3Cl:Eu2+ Ba) blue-shifted from Ca to Ba (454 nm for 444 434 Ba), those Sr5(PO4)3X:Eu2+ (X red-shifted along series halides, F → Cl Br (437 448 Br). site selectivity occupancy activator (Eu2+) in M5(PO4)3X:Eu2+ crystal lattices estimated based on theoretical calculation 5d 4f transition...
Abstract The demands for higher energy density of rechargeable batteries have been continuously increasing recently, and cationic redox based current cathodes little scope to further increase since they already exhibit near‐theoretical specific capacities. In this regard, oxygen (OR) reactions emerged as a promising breakthrough sodium‐ion battery (SIB) cathodes. Most OR‐based layered oxides suffer from drastic hysteretic‐oxygen capacities upon discharging after the first charging. contrast,...
The role of pH in sequestration Cr(VI) by zerovalent magnesium (ZVMg) was characterized global fitting a kinetic model to time-series data from unbuffered batch experiments with varying initial values. At values ranging 2.0 6.8, ZVMg (0.5 g/L) completely reduced (18.1 μM) within 24 h, during which time rapidly increased plateau value ∼10. Time-series correlation analysis the and aqueous Cr(VI), Cr(III), Mg(II) concentration suggested that these conditions are controlled combinations...
Gd 2 O 3 : Eu 3+ and Li-doped Gd2O3:Eu3+ luminescent thin films have been grown on Al2O3 (0001) substrates using pulsed-laser deposition. The under different deposition conditions show microstructural characteristics. Both cubic monoclinic crystalline structures were observed in films, but only the structure was for certain condition. photoluminescence (PL) brightness data obtained from indicate that sapphire is a promising substrate growth of high-quality thin-film red phosphor. In...
Copper (Cu) thin films have been widely used as electrodes and interconnection wires in integrated electronic circuits more recently substrates for the synthesis of graphene. However, ultra-high vacuum processes required high-quality Cu film fabrication, such molecular beam epitaxy (MBE), restricts mass production with low cost. In this work, we demonstrated using a single-crystal target radio-frequency (RF) sputtering technique; resulting quality was comparable to that produced MBE, even...
The development of highly efficient flexible transparent electrodes (FTEs) supported on polymer substrates is great importance to the realization portable and bendable photovoltaic devices. Highly conductive, low-cost Cu has attracted attention as a promising alternative for replacing expensive indium tin oxide (ITO) Ag. However, efficient, Cu-based FTEs are currently unavailable because absence an means attaining atomically thin, completely continuous film that simultaneously exhibits...