A5081959425- Electrocatalysts for Energy Conversion
- Fuel Cells and Related Materials
- Advanced battery technologies research
- Advancements in Solid Oxide Fuel Cells
- Machine Learning and ELM
- Perovskite Materials and Applications
- MXene and MAX Phase Materials
- Advancements in Battery Materials
- Advanced Semiconductor Detectors and Materials
- Advanced Biosensing Techniques and Applications
- Graphene research and applications
- Extraction and Separation Processes
- Monoclonal and Polyclonal Antibodies Research
- Machine Learning in Materials Science
- Quantum Dots Synthesis And Properties
- Nanofabrication and Lithography Techniques
- Advanced Condensed Matter Physics
- Electronic and Structural Properties of Oxides
- Conducting polymers and applications
- Electrochemical Analysis and Applications
- 2D Materials and Applications
- Magnetic and transport properties of perovskites and related materials
- Chalcogenide Semiconductor Thin Films
- Advanced Battery Technologies Research
Korea Institute of Science and Technology
2025
Ajou University
2023-2024
Korea Advanced Institute of Science and Technology
2018-2021
Although numerous studies on oxide catalysts for an efficient oxygen evolution reaction have been carried out to compare their catalytic performance and suggest new compositions, two significant constraints overlooked. One is the difference in electronic conduction behavior between (metallic versus insulating) other strong crystallographic surface orientation dependence of catalysis a crystal. Consequently, unless comprehensive comparison oxygen-evolution activity samples made...
As chemical reactions and charge-transfer simultaneously occur on the catalyst surface during electrocatalysis, numerous studies have been carried out to attain an in-depth understanding correlation among structure composition, electrical transport, overall catalytic activity. Compared with other catalysis reactions, a relatively larger activation barrier for oxygen evolution/reduction (OER/ORR), where multiple electron transfers are involved, is noted. Many works over past decade thus...
Abstract A grain boundary forms as an internal interface when two crystalline grains with mutually different crystallographic orientations are in direct contact each other. As a result, atomic arrangement at boundaries differs from that of the bulk, showing serious displacements deviating original symmetric positions. these symmetry‐broken configurations difficult to achieve bulk crystals, considered distinctive platforms can exhibit new physical properties. By using both sintered...
Abstract As the physical properties of ABX 3 perovskite-based oxides strongly depend on geometry oxygen octahedra containing transition-metal cations, precise identification distortion, tilt, and rotation is an essential step toward understanding structure–property correlation. Here we discover important electrostatic origin responsible for remarkable Jahn–Teller-type tetragonal distortion during atomic-level direct observation two-dimensional [AX] interleaved shear faults in five different...
Regulating protein interactions and corona formation of nanomaterials is crucial for advancing nanomedicine, where surface engineering plays a pivotal role in precise control over biological interactions. Here, we present surface-engineered nanoparticle-based immunoassay platform using carboxyl-enriched polystyrene nanobeads (CEPS) with regioselectively controlled antibody-binding properties. Proteomic analysis theoretical simulation revealed that CEPS has an enhanced Fc-specific binding...
Abstract Point defects play a crucial role in determining the properties of atomically thin semiconductors. This work demonstrates controlled formation different types and their comprehensive optical characterization using hyperspectral line imaging (HSLI). Distinct responses are observed monolayer semiconductors grown under stoichiometries metal‐organic chemical vapor deposition. HSLI enables simultaneous measurement 400 spectra, allowing for statistical analysis signatures at close to...
Mesoscopic-scale stacking reconfigurations are investigated when van der Waals films stacked. We have developed a method to visualize complicated structures and mechanical distortions simultaneously in stacked atom-thick using Raman spectroscopy. In the rigid limit, we found that originate from transfer process, which can be understood through thin film mechanics with large elastic property mismatch. contrast, atomic corrugations, in-plane strain fields more closely correlated configuration,...
In article number 1802481, Sung-Yoon Chung and co-workers demonstrate that grain boundaries (GBs) in LaCoO3 LaMnO3 are exceptionally active sites for oxygen evolution reaction (OER) electrocatalysis. By using a combination of bicrystal thin films, atomic-scale direct observations, theoretical calculations, this work elucidates the strong correlation between symmetry-broken atomic displacements at GBs variation electronic structure to facilitate charge transfer thus OER activity.