A5101703630- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Microstructure and mechanical properties
- Magnetic Properties and Applications
- Cellular Mechanics and Interactions
- Catalytic Processes in Materials Science
- Advanced Battery Technologies Research
- Graphene and Nanomaterials Applications
- Aluminum Alloys Composites Properties
- Aluminum Alloy Microstructure Properties
- Electrocatalysts for Energy Conversion
- Electric Motor Design and Analysis
- Non-Destructive Testing Techniques
- Anodic Oxide Films and Nanostructures
- Metal and Thin Film Mechanics
- 3D Printing in Biomedical Research
- Machine Learning in Materials Science
- Microstructure and Mechanical Properties of Steels
- Perovskite Materials and Applications
- Surface and Thin Film Phenomena
- High-Velocity Impact and Material Behavior
- Semiconductor materials and devices
- 2D Materials and Applications
- Electron and X-Ray Spectroscopy Techniques
- High voltage insulation and dielectric phenomena
Korea Advanced Institute of Science and Technology
2020-2025
Korea Institute of Science and Technology
2017-2025
Korean Association Of Science and Technology Studies
2020
Korea University
2018-2020
Korea University of Science and Technology
2020
Sungkyunkwan University
2016
Korea Electrotechnology Research Institute
2006-2009
Seoul National University
1998-2001
van der Waals (vdW) heterostructures based on two-dimensional (2D) atomic crystal materials are fascinating platforms for fundamental studies and device applications. In this study, we suggest the 2D MoTe2/ReS2 heterostructure a high performance photodiode with an additional function of linearly polarized photodetection. The optical properties energy band diagram heterostructure, which can be directly correlated photodetection, investigated by microabsorption photoemission spectroscopy...
Abstract Extracellular matrix (ECM) proteins containing cell‐attachable Arg‐Gly‐Asp (RGD) sequences exhibit variable bridging and non‐bridging in fibronectin‐collagen laminin‐collagen complexes that can regulate inflammation, tissue repair, wound healing. In this study, linking molecule‐mediated conjugation of 1D magnetic nanocylinders (MNCs) to material surfaces pre‐decorated with gold nanospheres (GNSs) is performed, thereby yielding RGD‐coated MNCs (RGD‐MNCs) over GNSs (RGD‐GNSs) a state....
Understanding the interfacial phenomena in composite cathodes is essential for achieving excellent cycle performance all-solid-state batteries (ASSBs), which exhibit high safety and energy densities. Herein, we report on spontaneous crack-healing mechanism a cathode consisting of LiNi0.7Co0.15Mn0.15O2 (NCM) Li6PS5Cl0.5Br0.5. This exhibited during cell tests owing to stack pressure, enhanced ionic electrical transfers at material interfaces by remarkably reducing macrocracks between materials...
Abstract In natural microenvironment, various proteins containing adhesive ligands in fibrous and non‐fibrous structures dynamically couple decouple to regulate stem cell fate. Herein, materials presenting movably couplable are developed by grafting liganded gold nanoparticles (AuNPs) a substrate followed flexibly movable linear nanomaterials (MLNs) the via long bendable linker, thereby creating space between MLNs AuNPs decoupled state. Magnetic control of decreases this bending linker...
Despite its effectiveness in improving the properties of materials, strain engineering has not yet been employed to endow catalytic characteristics apparently nonactive metals. This limitation can be overcome by controlling simultaneously lattice strains and charge transfer originated from epitaxially prepared bimetallic core-shell structure. Here, we report experimental results direct H2O2 synthesis enabled a strained Au layer grown on Pd nanoparticles. system benefit individual each...
Abstract Native tissues exhibit hierarchical structures of anisotropically arranged extracellular matrix that dynamically regulate stem cells and tissue function. However, neither multiscale nano‐anisotropy nor dynamic anisotropy control have been reported. In this study, spherical or rod‐shaped gold small‐nanomaterials (at integrin receptor‐scale; tens nanometers) are coupled to the surface magnetic large‐nanomaterials focal adhesion complex‐scale; hundreds nanometers), with both showing...
Lithiation kinetics of a Si-C composite anode for high-capacity lithium (Li)-ion batteries were investigated through in situ lithiation and electrochemical C–V measurements using focused ion beam (FIB). Here, we found the procedure that Li migrates sequentially into carbon (C), nanopores, silicon (Si) composite. In first step, was intercalated inside C particles while spreading over surface particles. The second process occurred filling nanopores existing between electrode consisted acted as...
Abstract Light element identification is necessary in materials research to obtain detailed insight into various material properties. However, reported techniques, such as scanning transmission electron microscopy (STEM)-energy dispersive X-ray spectroscopy (EDS) have inadequate detection limits, which impairs identification. In this study, we achieved light with nanoscale spatial resolution a multi-component metal alloy through unsupervised machine learning algorithms of singular value...
Abstract Precise control over polarity in field‐effect transistors (FETs) plays a pivotal role the design and construction of complementary metal–oxide–semiconductor (CMOS) logic circuits. In particular, achieving such precise 2D semiconductors is crucial for further development advanced electronic applications beyond unit devices. This paper presents systematic investigation on reversible transition carrier types MoTe 2 semiconductor under different annealing atmospheres. Photoemission...
The native extracellular matrix is continuously remodeled to form complex interconnected network structures that reversibly regulate stem cell behaviors. Both regulation and understanding of its intricate dynamicity can help modulate numerous However, neither these has yet been achieved due the lack designing modeling such with dynamic controllability. Here we report modularity-based mathematical matrix-emulating ligand inter-cluster connectivity using graph theory. Increasing anisotropy...
Mechanical cracks in an all-solid-state battery (ASSB) disrupt lithium-ion conduction pathways; thus, strategies to overcome these are warranted. We found that the stack pressure during charging and discharging heals microcracks ASSBs, which imparts long-term cyclability a composite anode made of graphite solid-state electrolyte (SE, Li6PS5(Cl,Br)). The were generated when fabrication 400 MPa was released but mechanically bonded under 40 cycle tests. They healed further due formation solid...
The CuS anode enables spontaneous transformation into a porous nanostructure and the formation of conductive Cu nanoparticles. These features conversion for Na-ion batteries exhibit remarkable electrochemical performance.
A novel technique was proposed for evaluating a local heat source in film power capacitors by adopting minimized analysis model. It is impossible to analyze directly the distributions of capacitor element because tiny scale aluminum foil and polypropylene compared length element. To overcome such multi-scale problem, here, we approximation (LHSA) time-harmonic electroquasistatic (EQS) conduction law. evaluate dielectric losses film, complex permittivity introduced calculating effective...
The selective enhancement of catalytic activity is a challenging task, as catalyst modification generally accompanied by both desirable and undesirable properties. For example, in the case direct synthesis hydrogen peroxide, Pt on Pd improves conversion, but lowers peroxide selectivity, whereas Au enhances selectivity decreases conversion. Toward an ideal property, development that capable improving H-H dissociation for increasing H2 whilst suppressing O-O high H2O2 would be highly...
In the study of metallic glasses, characterization free volumes and icosahedral clusters has been a longstanding approach to understanding plasticity. However, recent research illuminated limitations exclusively relying on these factors explain plastic deformation glasses. To address this limitation, we have introduced concept called h-value in prior study, which quantifies spatial distribution disrupted interpenetrating connections icosahedra provides insights into how minor elements...
This paper presents a finite element analysis procedure combined with vector hysteresis model for the accurate of an motor. The magnetization-dependent is adopted to calculate magnetization ring. From magnitude and direction magnetic field intensity, each ring calculated by model. By comparing simulation results experimental data, it found that proposed method gives good results.
Multi-metallic Pd@FePt core–shell nanoparticles were synthesized using a direct seed-mediated growth method, consisting of facile and mild procedures, to increase yield. The Fe/Pt ratio in the shell was easily controlled by adjusting amount Fe Pt precursors. Furthermore, compared with commercial Pt/C catalysts, exhibited excellent activity stability toward methanol oxidation reaction (MOR), making them efficient fuel cells (DMFC).