Se‐Hun Kwon
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View article: Study on the Wear Characteristics of Zn Precipitation‐Strengthened Al Alloy
Study on the Wear Characteristics of Zn Precipitation‐Strengthened Al Alloy Open
This study investigates the wear behavior of as‐cast aluminum alloys containing Sn or Zn, with minor additions of Cu and Mg. The effects of alloy composition on hardness, friction coefficient, and wear resistance are evaluated through micr…
View article: Observation of Macroscopic Nonlocal Voltage and Hydrodynamic Electron Flow at Room Temperature
Observation of Macroscopic Nonlocal Voltage and Hydrodynamic Electron Flow at Room Temperature Open
Imagine three resistors connected in series. Normally when a battery is connected across the center resistor, the side resistors remain silent with no current flow and no voltage across. Nonlocal voltage is the exceptional potential differ…
View article: Wear Transition of Silicon-Doped Tetrahedral Amorphous Carbon (ta-C:Si) Under Water Lubrication
Wear Transition of Silicon-Doped Tetrahedral Amorphous Carbon (ta-C:Si) Under Water Lubrication Open
Silicon-doped tetrahedral amorphous carbon (ta-C:Si) coatings are promising materials for achieving ultralow friction in water-lubricated environments, attributed to the formation of Si(OH)x-based tribofilms. However, the deposition proces…
View article: Effect of Heat Treatment on Corrosion Resistance of A356 Casting Alloy
Effect of Heat Treatment on Corrosion Resistance of A356 Casting Alloy Open
Al-Si alloy, known for its excellent corrosion resistance and high strength, is utilized across various industries, such as electric vehicles, requiring light metal parts for efficiency. Heat treatment is an effective process for enhancing…
View article: Enhanced Capacitive Performance of Microwave-Driven CNTs on Carbonized Cigarette Filter Waste for Sustainable Energy Storage
Enhanced Capacitive Performance of Microwave-Driven CNTs on Carbonized Cigarette Filter Waste for Sustainable Energy Storage Open
Microplastic pollution represents a significant global environmental issue, with cigarette filters being a major contributor due to their slow biodegradation. To address this issue while creating valuable materials, we developed a novel ap…
View article: Effect of Gas Pressure on the Oxidation Behavior of Cu and Cu Alloys
Effect of Gas Pressure on the Oxidation Behavior of Cu and Cu Alloys Open
This study investigated the effect of gas pressure and alloying elements on the oxidation behavior of copper. Copper alloys containing 1 wt.% of zinc, nickel, or manganese were cast using vacuum induction melting, followed by solution trea…
View article: Preparation of ZIF-8-based nanocomposites and their notable antibacterial activities
Preparation of ZIF-8-based nanocomposites and their notable antibacterial activities Open
ZIF-8-based nanocomposites and their notable antibacterial activities.
View article: Promoting photogenerated charge separation and transfer in a CuBi <sub>2</sub> O <sub>4</sub> photocathode for improved photoelectrochemical performance
Promoting photogenerated charge separation and transfer in a CuBi <sub>2</sub> O <sub>4</sub> photocathode for improved photoelectrochemical performance Open
A nanostructured CuBi 2 O 4 photocathode by surfactant-assisted sol–gel dropcasting method showed a high photocurrent density of −3.8 mA cm −2 and charge separation efficiency of 30.5% at 0.2 V vs. RHE in 0.1 M Na 2 SO 4 with H 2 O 2 as an…
View article: Atomic Layer Deposition of Y2O3 Thin Films Using Y(MeCp)2(iPr-nPrAMD) Precursor and H2O, and Their Erosion Resistance in CF4-Based Plasma
Atomic Layer Deposition of Y2O3 Thin Films Using Y(MeCp)2(iPr-nPrAMD) Precursor and H2O, and Their Erosion Resistance in CF4-Based Plasma Open
Atomic layer deposition (ALD) of Y2O3 thin films was investigated using Y(MeCp)2(iPr-nPrAMD) precursor and H2O reactant. The self-limiting reaction mechanism of ALD-Y2O3 thin films was confirmed at a growth temperature of 260 °C. And, the …
View article: Growths of SiC Single Crystals Using the Physical Vapor Transport Method with Crushed CVD-SiC Blocks Under High Vertical Temperature Gradients
Growths of SiC Single Crystals Using the Physical Vapor Transport Method with Crushed CVD-SiC Blocks Under High Vertical Temperature Gradients Open
A recent study reported the rapid growth of SiC single crystals of ~1.5 mm/h using high-purity SiC sources obtained by recycling CVD-SiC blocks used as materials in semiconductor processes. This method has gained attention as a way to impr…
View article: Rational Design of Photoanodes to Produce Value‐Added Chemicals Coupled with Hydrogen
Rational Design of Photoanodes to Produce Value‐Added Chemicals Coupled with Hydrogen Open
Green hydrogen fuel generation via the photoelectrochemical (PEC) approach has attracted considerable attention recently for its sustainability and eco‐friendliness. Photoelectrocatalysts are the key component of the PEC process. To produc…
View article: Microstructure, Thermal and Mechanical Properties of AlN-MgO Composites Prepared by Spark Plasma Sintering
Microstructure, Thermal and Mechanical Properties of AlN-MgO Composites Prepared by Spark Plasma Sintering Open
AlN-MgO composites with different compositions were prepared by spark plasma sintering, and the effects of their composition on their microstructure, thermal properties, and mechanical properties were systemically investigated. MgO composi…
View article: Influence of Active Afterheater in the Crystal Growth of Gallium Oxide via Edge-Defined Film-Fed Growing Method
Influence of Active Afterheater in the Crystal Growth of Gallium Oxide via Edge-Defined Film-Fed Growing Method Open
In this study, we explored the effect of an active afterheater on the growth of gallium oxide single crystals using the EFG method. We analyzed the temperature distribution of the crystal under the growing process through multiphysics simu…
View article: Assessment of Joinability in Additively Manufactured Interlocking Structures
Assessment of Joinability in Additively Manufactured Interlocking Structures Open
This study investigates the challenges of additively manufactured interlocking structures, emphasizing joinability issues due to thermal deformation. These challenges become pronounced when fabricating high-density structures without fully…
View article: Improving the photoelectrochemical stability of a bismuth vanadate photoanode for solar water oxidation
Improving the photoelectrochemical stability of a bismuth vanadate photoanode for solar water oxidation Open
Bismuth vanadate (BiVO4) has attracted significant attention as a photoanode material in photoelectrochemical water-splitting devices. However, its photoelectrochemical performance is limited by rapid photogenerated charge recombination an…
View article: Effect of Microstructure on Electroless Ni Plating Behavior on Super Duplex Stainless Steel SAF2507 in Li-Ion Batteries
Effect of Microstructure on Electroless Ni Plating Behavior on Super Duplex Stainless Steel SAF2507 in Li-Ion Batteries Open
The demand for Li-ion batteries has significantly increased in recent years, driven by the growing need for electric vehicles and electronic devices like smartphones. Among various materials, super duplex stainless steel (SDSS) is consider…
View article: Assessment of Joinability in Additive Manufactured Interlocking Structure with Experiment and Simulation
Assessment of Joinability in Additive Manufactured Interlocking Structure with Experiment and Simulation Open
Additive manufactured interlocking structures often face challenges in achieving suitable joinability due to thermal deformation. This issue becomes particularly interesting when fabricating structures that require high density but not ful…
View article: Direct Printing of Ultrathin Block Copolymer Film with Nano‐in‐Micro Pattern Structures
Direct Printing of Ultrathin Block Copolymer Film with Nano‐in‐Micro Pattern Structures Open
Nanotransfer printing (nTP) is one of the most promising nanopatterning methods given that it can be used to produce nano‐to‐micro patterns effectively with functionalities for electronic device applications. However, the nTP process is hi…
View article: Surface modification of color-clarifying layer in transparent conductive oxide based distributed Bragg reflector-diffuser electrode for building-integrated photovoltaics
Surface modification of color-clarifying layer in transparent conductive oxide based distributed Bragg reflector-diffuser electrode for building-integrated photovoltaics Open
We fabricated a colored transparent thin-film silicon solar cell (TSC) using a transparent distributed Bragg reflector (DBR) electrode for building-integrated photovoltaics (BIPVs). To construct a transparent DBR electrode, indium tin oxid…
View article: The Thermal Resistance Performance of WTi Alloy-Thin-Film Temperature Sensors Prepared by Magnetron Sputtering
The Thermal Resistance Performance of WTi Alloy-Thin-Film Temperature Sensors Prepared by Magnetron Sputtering Open
The microstructure and properties of WTi alloy films with 0~23 at.% Ti prepared by magnetron sputtering were investigated. The electrical resistivity gradually increased with the increase in the Ti content. When the Ti content was 6.8 at.%…
View article: A Comparative Investigation on the Microstructure and Thermal Resistance of W-Film Sensor Using dc Magnetron Sputtering and High-Power Pulsed Magnetron Sputtering
A Comparative Investigation on the Microstructure and Thermal Resistance of W-Film Sensor Using dc Magnetron Sputtering and High-Power Pulsed Magnetron Sputtering Open
Traditional dc magnetron sputtering has a low ionization rate when preparing metallic thin films. With the development of thin film science and the market demand for thin film material applications, it is necessary to improve the density o…
View article: Synthesis of Yttria-Stabilized Zirconia Nanospheres from Zirconium-Based Metal–Organic Frameworks and the Dielectric Properties
Synthesis of Yttria-Stabilized Zirconia Nanospheres from Zirconium-Based Metal–Organic Frameworks and the Dielectric Properties Open
Yttria-stabilized zirconia (YSZ) nanospheres were synthesized by calcination at 900 °C after the adsorption of Y3+ ions into the pores of a zirconium-based metal–organic framework (MOF). The synthesized 3YSZ (zirconia doped with 3 mol% Y2O…
View article: Effect of uniformity and surface morphology of Pt nanoparticles to enhance oxygen reduction reaction in polymer electrolyte membrane fuel cells
Effect of uniformity and surface morphology of Pt nanoparticles to enhance oxygen reduction reaction in polymer electrolyte membrane fuel cells Open
Platinum (Pt)-based electrocatalysts supported by reduced graphene oxide (rGO) is fabricated under microwave-assisted polyol method with various nucleation and growth conditions. The surface morphologies of the Pt nanoparticles (NPs) under…