Publications
2026
Complementary Electro-Ionic Reconstruction Driven by Interface Polarity
Direct Visualization of Interfacial Defect Effects on Polarization Switching in BaTiO3 Tunnel Junctions
Emergence of Metastable Phases in Transition Metal Oxides via Ostwald 1 Step Rules Governed by Non-equilibrium Thermodynamics
Giant Magnetization Enhancement at Ultrathin Limit of an Orthoferrite
High-density Iridium Single Atoms on Vanadium-doped TiO2 for Electrochemical Water Oxidation Catalysis
Imaging 3D polarization dynamics via deep learning 4D-STEM
Ternary Metal Nitrides for Substantially Enhanced Oxide Heterostructures
Visualizing Oxygen Vacancy-Induced Dielectric Dead Layer at Metal-Oxide Interfaces by In-situ Multimodal Electron Microscopy
Atomic-Scale Degradation Mechanisms during Nanoparticle Exsolution in Thin Films
Atomic-scale Energy Dispersive X-ray Spectroscopy Determining Site Occupancy of Amphoteric Dopant in BaTiO3 and Correlating with Electrical Properties
Bio-inspired Auxetic Bimodal Particle Reinforced Composites with Chiral Confinement – A computational study
Flexoelectric Polarization–Electric Field Coupling-Driven Phase Transformation in Epitaxial Films
Heterogeneous Integration of Flipped Oxide Heterostructure Membranes for Nanoelectronics
Impact of sidewall passivation on reliability in InGaN-based micro-LEDs
Metal–Amide Chemistry Enables Controlled Heavy-Pnictogen Reduction for Colloidal III–V Nanocrystal Synthesis
Unveiling Exsolution-Induced Giant Electronic and Magnetic Property Changes in Non-Stoichiometric Titanate Perovskite Thin Films
2025
Elastic Relaxation of Coherent InGaN/GaN Interfaces at the Microwire LED Sidewall
Monitoring the formation of infinite-layer transition metal oxides through in situ atomic-resolution electron microscopy
Nanoscale mechanisms limiting non-basal plasticity in magnesium
Porous CuBi2O4 Photocathode with Intrinsic Cu+/Cu2+ Redox Improves Solar C(sp3)-H Bond Conversion Efficiency by an Order of Magnitude
Roles of Nanoscale Defects of Graphene in Remote Epitaxy of GaN
Subsurface Oxygen Vacancy Mediated Surface Reconstruction and Depolarization of Ferroelectric BaTiO3 (001) Surface
2024
Achieving High Strength and Uniform Ductility in High-Entropy alloys via Dynamic-Precipitation Accelerated Transformation-Induced Plasticity
Charge-Mediated Stable Low-Valence Cu on TiO2 for Photocatalytic CO2-to-Ethylene Production
Electronic-grade epitaxial (111) KTaO3 heterostructures
Field-induced modulation of two-dimensional electron gas at LaAlO3/SrTiO3 interface by polar distortion of LaAlO3
Multiphase cooperation for multilevel strain accommodation in a single-crystalline BiFeO3 thin film
Solar-driven highly selective conversion of glycerol to dihydroxyacetone using surface atom engineered BiVO4 photoanodes
Spatial Control of Nickel Vacancies in Colloidal NiMgO Nanocrystals for Efficient and Stable All-inorganic Quantum Dot Light-Emitting Diodes
Surface triggered stabilization of metastable charge-ordered phase in SrTiO3
Surface-Originated Weak Confinement in Tetrahedral Indium Arsenide Quantum Dots
Unit-cell-thickness Electron Confinement by Geometrically Constrained Antipolar Ordering
2023
2D-material-assisted GaN growth on GaN template by MOCVD and its exfoliation strategy
Direct observation of atomic step-assisted stabilization of polar surface
Geometrical Doping at the Atomic Scale in Oxide Quantum Materials
Interface-Controlled Biomimetic Intrafibrillar Mineralization of Collagen: Effect of Ca2+/[PO4]3- Concentration Ratio
Lower hardness than strength: the auxetic composite microstructure of limpet tooth
2022
A two-photon tandem black phosphorus quantum dot-sensitized BiVO4 photoanode for solar water splitting
Anti-phase boundary accelerated exsolution of nanoparticles in non-stoichiometric perovskite thin films
Atomic-scale Operando Observation of Oxygen Diffusion during Topotactic Phase Transition of a Perovskite Oxide
c-Axis-Oriented Platelets of Crystalline Hydroxyapatite in Biomimetic Intrafibrillar Mineralization of Polydopamine Functionalized Collagen Type I
Ghost-Template-Faceted Synthesis of Tunable Amorphous Hollow Silica Nanostructures and their Ordered Mesoscale Assembly
High-Resolution Mapping of Strain Partitioning and Relaxation in InGaN/GaN Nanowire Heterostructures
Highly efficient blue InGaN nanoscale light-emitting diodes
Limpet Teeth microstructure unites auxeticity with extreme strength and high stiffness
Non-oxidized bare copper nanoparticles with surface excess electrons in air
Orientation-dependent micromechanical behavior of nacre: in situ TEM experiments and finite element simulations
Oxide Two-Dimensional Electron Gas with High Mobility at Room-Temperature
Shape-Tuned Multiphoton-Emitting InP Nanotetrapods
The origin of jerky dislocation motion in high-entropy alloys
Vacancy driven surface disorder catalyzes anisotropic evaporation of ZnO (0001) polar surface
SKKU (2016-2021)
2021
A Study on Dislocation Mechanisms of Toughening in Cu-Graphene Nanolayered Composite
Analysis of Local Charges at Hetero-interfaces by Electron Holography - A Comparative Study of Different Techniques
Atomically conformal metal-laminations on plasmonic nanocrystals for efficienct catalysis
Coexistence of surface superconducting and three-dimensional topological Dirac states in semimetal KZnBi
Cooperative evolution of polar distortion and nonpolar rotation of oxygen octahedra in oxide heterostructures
Corrosion-engineered bimetallic oxide electrode as anode for high-efficiency anion exchange membrane water electrolyzer
Crystallographic Orientation Analysis of Nanocrystalline Tungsten Thin Film using TEM Precession Electron Diffraction and SEM Transmission Kikuchi Diffraction
Defect engineered MoWS alloy catalyst boost the polysulfide conversion in lithium–sulfur battery
Disordered-Layer-Mediated Reverse Metal-Oxide Interactions for Enhanced Photocatalytic Water Splitting
Electronic and Structural Transitions of LaAlO3/SrTiO3 Heterostructure Driven by Polar Field Assisted Oxygen Vacancy Formation at the Surface
Electronically reconfigurable complex-oxide heterostructure freestanding membranes
Prospects of using small scale testing to examine different deformation mechanisms in nanoscale crystals - a case study in Mg
2020
Dislocation plasticity in FeCoCrMnNi high-entropy alloy: quantitative insights from in situ transmission electron microscopy deformation
In situ observation of the initiation of plasticity by nucleation of prismatic dislocation loops
In-situ TEM observation of void formation and migration in phase change memory devices with confined nanoscale Ge2Sb2Te5
Mixed Phase 2D Mo0.5W0.5S2 Alloy as a Multi-Functional Electrocatalyst for a high-performance cathode in Li-S batteries
Water- and acid-stable self-passivated dihafnium sulfide electride and its persistent electrocatalytic reaction
2019
Atomically Thin Three-Dimensional Membranes of van der Waals Semiconductors by Wafer-Scale Growth
Creation of two-dimensional layered Zintl phase by dimensional manipulation of crystal structure
Direct observation of degenerate interface layer in GaN/sapphire heterostructure
In-operando stacking of reduced graphene oxide towards active hydrogen evolution
Insights into fundamental deformation processes from advanced in situ transmission electron microscopy
2018
Composition-tunable synthesis of large-scale Mo1-xWxS2 alloy with enhanced photoluminescence
Direct imaging of the electron liquid at oxide interfaces
Direct observation of a two-dimensional hole gas at oxide interfaces
Fabrication of a stable new polymorph gold nanowire with sixfold rotational symmetry
Highly fluidic liquid at homointerface generates grain boundary dislocation arrays for high-performance bulk thermoelectrics
In-situ TEM observation of {10-12} twin-dominated deformation of Mg pillars: Twinning mechanism, size effects and rate dependency
Multiple Heterojunction in Single Titanium Dioxide Nanoparticle for Novel Metal-free Photocatalysis
Strain-induced Indium Clustering in Non-polar a-plane InGaN Quantum Wells
2017
Active hydrogen evolution through lattice distortion in semimetallic MoTe2
Defect induced Epitaxial Growth for Efficient Solar Hydrogen Production
Hardening and toughening mechanisms in nanotwinned ceramics
In situ TEM Observation on the interface-type resistive switching by electrochemical redox reactions at a TiN/PCMO interface
Nanometer-Scale Phase Transformation Determines Threshold and Memory Switching Mechanism
Role of Graphene in Reducing Fatigue Damage in Cu/Gr Nanolayered Composite
Sharpened VO2 phase transition via controlled release of epitaxial strain
2016
Analog Synapse Device With 5-b MLC and Improved Data Retention for Neuromorphic System
FIB-induced dislocations in Al submicron pillars: Annihilation by thermal annealing and effects on deformation behavior
Interface dominated mechanical properties of ultra-fine grained and nanoporous Au at elevated temperatures
Nanoscale graphene coating on commercially pure titanium for accelerated bone regeneration
Nanotwin-governed toughening mechanism in hierarchically structured biological materials
Synthesis and Mechanical Characterisation of an Ultra-fine Grained Ti-Mg Composite
POSTECH (2009-2015)
2015
Correlative High-Resolution Mapping of Strain and Charge Density in a Strained Piezoelectric Multilayer
Effect of a high angle grain boundary deformation behavior of Al nanopillars
Effect of Surface Energy on Size-Dependent Deformation Twinning of Defect-Free Au Nanowires
Emergence of Room-Temperature Ferroelectricity at Reduced Dimensions
Enhanced power conversion efficiency of dye-sensitized solar cells with multifunctional photoanodes based on a three-dimensional TiO2 nanohelix array
Enhancement of the anisotropic photocurrent in ferroelectric oxides by strain gradients
High density neuromorphic system with Mo/Pr0.7Ca0.3MnO3 synapse and NbO2 IMT oscillator neuron
Microstructural evolution and strain-hardening behavior of multi-pass caliber-rolled TI-13Nb-13Zr
Microstructure-dependent DC set switching behaviors of Ge-Sb-Te-based phase-change random access memory devices accessed by in situ TEM
Self-relaxed conductive filament in ReRAM analyzed by in-situ TEM and Atom Probe Tomography
Solid-state Conversion Chemistry of Multicomponent Nanocrystals Cast in a Hollow Silica Nanosphere: Morphology-controlled Syntheses of Hybrid Nanocrystals
Three-dimensional real structure-based finite element analysis of mechanical behavior for porous titanium manufactured by a space holder method
2014
Bioinspired silica nanocomposite with auto-encapsulated carbonic anhydrase as a robust biocatalyst for CO2 sequestration
Critical evaluation and thermodynamic optimization of Mg-Ga system and effect of low pressure on phase equilibria
Enhanced power conversion efficiency of quantum dot sensitized solar cells with near single-crystalline TiO2 nanohelixes used as photoanodes
Enhanced surface hardening of AISI D2 steel by atomic attrition during ion nitriding
Highly Efficient Photoelectrochemical Hydrogen Production from BiVO4-Decorated WO3 Helix Nanostructures
Microstructural evolution of a FIB-fabricated Mg nanopillar at high temperatures: Defect annihilation and sublimation
Microstructural refinement of Ni/Ce0.8Gd0.2O2-δ anodes for low-temperature solid oxide fuel cell by wet infiltration loading of PdCl2
Reversible cyclic deformation mechanism of Au Nanowires by twinning-detwinning transition evidenced from in-situ TEM
Space-Holder Effect on Designing Pore Structure and Determining Mechanical Properties in Porous Titanium
Three-Dimensional nanostructured Indium-Tin-Oxide electrodes for enhanced performance of bulk heterojunction organic solar cells
2013
Direct observation of asymmetric domain wall motion in a ferroelectric capacitor
In-situ characterization of switching mechanisms in phase change random access memory (PRAM) using transmission electron microscopy (TEM)
In-situ TEM observation of phase transition of the nanoscopic patterns on baroplastic block copolymer film during nanoindentation
Near Single Crystalline TiO2 Nanohelices Array: Enhanced Gas Sensing Performances and its Application as Monolithically Integrated Electronic Noses
Strain mapping of LED devices by dark-field inline electron holography: Comparison between deterministic and iterative phase retrieval approaches
Surface hardening of shot peened H13 steel by enhanced nitrogen diffusion
Transmission electron microscopy and thermodynamic studies of CaO-added AZ31 Mg alloys
나노재료의 격자 변형 분석
2012
2011
Dislocation Plasticity of Al film on Polyimide Investigated by Cross-sectional In-situ TEM
Graphenes Converted from Polymers
Image Processing of Defocus Series TEM Images for Extracting Reliable Phase Information
Quantitative Analysis of Layering and In-Plane Structural Ordering at an Alumina-Aluminium Solid-Liquid Interface
Seeing inside materials by aberration-corrected electron microscopy
2010
2009
Aberration-corrected scanning transmission electron microscopy: from atomic imaging and analysis to solving energy problems
Estimation of Electron Dose Rate using CCD Camera
Experiment of Usefulness of IWFR Analysis for High Voltage HRTEM Images with A Series of Defocus Steps Obtained from A Relatively Thick Crystal
In situ Observation of Dislocation Nucleation and Escape in a Submicron Single-Crystal Al Wire
Practical Issues on In-situ Heating Experiments in Transmission Electron Microscope
2008
Dipolar interactions and their influence on the critical single domain grain size of Ni in layered Ni/Al2O3 composites
Effect of spacer layer thickness on magnetic interactions in self-assembled single domain iron nanoparticles
Electron-beam-induced transition aluminas from aluminum trihydroxide
Point Defect Configurations of Supersaturated Au Atoms inside Si Nanowires
Scaling Exponent within the Side-jump Mechanism of Hall Effect Size Dependence in Ni Nanocrystals
Structural and flux-pinning properties of laser ablated YBa2Cu3O7-δ thin films: Effects of self-assembled CeO2 nanodots on LaAlO3 substrates
The effect of matrix and substrate on the coercivity and blocking temperature of self-assembled Ni nanoparticles
2007
Control of bonding and epitaxy of copper/sapphire interface
Defects in Strained Epitaxial SrRuO3 Films on SrTiO3 Substrates
In situ TEM straining of single crystal Au films on polyimide: Change of deformation mechanisms at the nanoscale
Size-Induced Transition from Perfect to Partial Dislocation Plasticity in Single Crystal Au Films on Polyimide
Strain Compensation by Twinning in Au Thin Films: Experiment and Model
2006
Bonding at copper-alumina interfaces established by different surface treatment: a critical review
Epitaxy and bonding of Cu films on oxygen terminated a-Al2O3 (0001) surfaces
In-situ HRTEM Studies of alumina-aluminum solid-liquid interfaces
Interface structure and strain development during compression test of Al2O3/Nb/Al2O3 tricrystals
Surface evolution of strained SrRuO3 films deposited at various temperatures on SrTiO3 (001) substrates
2005
2004
A study on the stability of the accelerating voltages in scanning electron microscopy
Effects of neutralizers on the crystal orientation of YSZ films grown by using ion beam sputtering
Microstructural changes in (1-x)Nd2/3TiO3-xNdAlO3 System
Microstructures in complex perovskite Li1/2Ln1/2TiO3 (Ln = Pr, Nd, Sm)
Misfit strain relaxation by dislocations in SrRuO3/SrTiO3 (001) heteroepitaxy
2003
2002
In-situ synthesis of carbon nanotubes on organic polymer substrates at atmospheric pressure
Metal-ZnO heterostructure nanorods with an abrupt interface
Microstructural analysis of Au/Ni/Al/Ti/Ta ohmic contact on AlGaN/GaN heterostructure
Packing density control of aligned carbon nanotubes
Preparation of aligned carbon nanotubes with prescribed dimensions: Templates synthesis and sonication and cutting approach
2001
Development of nanocrystals in an amorphous Zr47Ni30Ti23
Effects of grain orientation on the remanent polarization and leakage current characteristics of BLT (Bi3.25La0.75Ti3O12) thin film capacitors
Formation of high-temperature stable Co-silicide from Co0.92Ta0.08/Si system
Growth behavior and defects in conductive SrRuO3 thin films grown on a Si(100) substrate by sputtering
Improvement of the SiO2/Si interface characteristics by two-step deposition with intermediate plasma treatment using O2/He gas
Nanoscale characterization of interfacial reactions in SrRuO3 thin film on Si substrate
Wet oxidation behavior of polycrystalline Si1-xGex films
2000
A study on the microstructures and electrical properties of ZrO2 thin film on Si (100)
Domain structure and magnetic properties of epitaxial SrRuO3 films grown on SrTiO3 (100) substrates by ion beam sputtering
Reaction of Co and capping layers and its effect on CoSi2 formation on Si/SiOx/Co system
Thermal stability of RuO2/Ru bilayer thin film in oxygen atmosphere
1998
Thermal Stability of RuO2 Thin Film Annealed at High Temperature in Oxygen Atmosphere
No publications found.