Explanipedia

Atomic-scale 3D structural dynamics and functional degradation of Pt alloy nanocatalysts during the oxygen reduction reaction Open

Chaehwa Jeong, Juhyeok Lee, Hyesung Jo, KwangHo Lee, SangJae Lee , et al. · 2025

Pt-based electrocatalysts are the primary choice for fuel cells due to their superior oxygen reduction reaction (ORR) activity. To enhance ORR performance and durability, extensive studies have investigated transition metal alloying, dopin…

Exploiting Anisotropic Orientation in Nanoparticle-Aided Cryo-Electron Microscopy Sampling Open

Yeeun Kim, Changin Kim, Yongsoo Yang, Hyotcherl Ihee · 2025

Measuring the conformational distribution of small proteins is essential to understanding their role in biological systems. Multi-Tilt Nanoparticle-aided cryo-electron microscopy sampling (MT-NACS) was devised to measure the three-dimensio…

Quantitative Control of Oxygen Non‐Stoichiometry and Negative Raman Chemical Shift During Topotactic Phase Transition in a Ca‐Doped BiFeO <sub>3</sub> Thin‐Film Open

Heung‐Sik Park, Seonjeong Cheon, Yong‐Jun Kwon, Min‐Ho Kang, Jeonghun Suh , et al. · 2025

Controlling the non‐stoichiometry is an effective way to tune physicochemical properties of functional oxides and explore novel physical phenomena in complex oxides. Therefore, quantitative control of oxygen non‐stoichiometry in perovskite…

Highly stable two-level current fluctuation in complex oxide heterostructures Open

Doyeop Kim, Jung-Woo Lee, Jihyun Lim, Sungjun Choi, Khimananda Acharya , et al. · 2025

Advancing atomic electron tomography with neural networks Open

Juhyeok Lee, Yongsoo Yang · 2025

Spatial correlations of charge density wave order across the transition in 2H-NbSe2 Open

Seokjo Hong, Jaewhan Oh, Woohyun Cho, Soyoung Lee, Colin Ophus , et al. · 2025

Charge density waves (CDWs) involve coupled amplitude and phase degrees of freedom, but direct access to local amplitude correlations remains experimentally challenging. Here, we report cryogenic four-dimensional scanning transmission elec…

Polymorphic spin ordering in a single-crystalline cobalt-doped Fe3GaTe2 Open

Woohyun Cho, Jaehun Cha, Y. Kang, Dong Hyun David Lee, Jaehwan Oh , et al. · 2025

A single crystalline system typically stabilizes a unique state for spin ordering below a critical temperature. Certain materials exhibit multiple magnetic states, driven by structural phase transitions under varying thermodynamic conditio…

Crystal nucleation and growth in high-entropy alloys revealed by atomic electron tomography Open

Yakun Yuan, Saman Moniri, Yao Yang, Jihan Zhou, Andrew Yuan , et al. · 2025

High-entropy alloys (HEAs) balance mixing entropy and intermetallic phase formation enthalpy, creating a vast compositional space for structural and functional materials (1-6). They exhibit exceptional strength-ductility trade-offs in meta…

Crystal nucleation and growth in high-entropy alloys revealed by atomic electron tomography Open

Jianwei Miao, Yakun Yuan, Saman Moniri, Yao Yang, Jihan Zhou , et al. · 2025

High-entropy alloys (HEAs) balance mixing entropy and intermetallic phase formation enthalpy, creating a vast compositional space for structural and functional materials^1-6. They exhibit exceptional strength-ductility trade-offs…

Optical detection of bond-dependent and frustrated spin in the two-dimensional cobalt-based honeycomb antiferromagnet Cu3Co2SbO6 Open

Baekjune Kang, Uksam Choi, Taek Sun Jung, Seunghyeon Noh, Gye-Hyeon Kim , et al. · 2025

Observing Conformational Distribution of Protein using Nanoparticle-Aided Cryo-Electron Microscopy Sampling Open

Yeeun Kim, Changin Kim, Yongsoo Yang, Hyotcherl Ihee · 2025

Three-Dimensional Polar Topology in Ferroelectric Nanoparticles Open

Chaehwa Jeong, Juhyeok Lee, Hyesung Jo, Jaewhan Oh, Hionsuck Baik , et al. · 2025

Atomic-scale identification of active sites of oxygen reduction nanocatalysts Open

Yao Yang, Jihan Zhou, Zipeng Zhao, Geng Sun, Saman Moniri , et al. · 2024

Visualizing Heterogeneous Protein Conformations with Multi-Tilt Nanoparticle-Aided Cryo-Electron Microscopy Sampling Open

Yeeun Kim, Changin Kim, Sang Jin Lee, So Ri Yun, Jungkweon Choi , et al. · 2024

Obtaining the heterogeneous\nconformation of small proteins\nis important\nfor understanding their biological role, but it is still challenging.\nHere, we developed a multi-tilt nanoparticle-aided cryo-electron microscopy\nsampling (MT-NAC…

Singular Hall Response from a Correlated Ferromagnetic Flat Nodal‐Line Semimetal Open

Woohyun Cho, Y. Kang, Jaehun Cha, Dong Hyun David Lee, Do Hoon Kiem , et al. · 2024

Topological quantum phases are largely understood in weakly correlated systems, which have identified various quantum phenomena, such as the spin Hall effect, protected transport of helical fermions, and topological superconductivity. Robu…

Revealing the three-dimensional arrangement of polar topology in nanoparticles Open

Chaehwa Jeong, Juhyeok Lee, Hyesung Jo, Jaewhan Oh, Hionsuck Baik , et al. · 2024

Singular Hall response from a correlated ferromagnetic flat nodal-line semimetal Open

Woohyun Cho, Y. Kang, Jaehun Cha, Dong Hyun David Lee, Do Hoon Kiem , et al. · 2023

Topological quantum phases have been largely understood in weakly correlated systems, which have identified various quantum phenomena such as spin Hall effect, protected transport of helical fermions, and topological superconductivity. Rob…

Optical detection of bond-dependent and frustrated spin in the two-dimensional cobalt-based honeycomb antiferromagnet Cu3Co2SbO6 Open

Baekjune Kang, Uksam Choi, Taek Sun Jung, Seunghyeon Noh, Gye-Hyeon Kim , et al. · 2023

Two-dimensional honeycomb antiferromagnet becomes an important class of materials as it can provide a route to Kitaev quantum spin liquid, characterized by massive quantum entanglement and fractional excitations. The signatures of its prox…

Composition and Oxidation State Changes of NCM Materials over Cycling via Simultaneous EDS-EELS 3D Tomography Open

Jaewhan Oh, S. KIM, Hye Ryung Byon, Yongsoo Yang · 2023

Battery life and capacity are paramount factors in determining the efficacy of a battery [1].Lithium nickel cobalt manganese oxide (NCM) has emerged as a highly promising cathode material, renowned for its extended battery life and improve…

High-Fidelity 3D Imaging Achieved Through Multislice Electron Tomography Using 4D-STEM Open

Juhyeok Lee, Moosung Lee, YongKeun Park, Colin Ophus, Yongsoo Yang · 2023

Journal Article High-Fidelity 3D Imaging Achieved Through Multislice Electron Tomography Using 4D-STEM Get access Juhyeok Lee, Juhyeok Lee Department of Physics, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea Se…

Single-Atom Level Determination of 3-Dimensional Surface/Interface Atomic Structures via Deep Learning-Assisted Atomic Electron Tomography Open

Juhyeok Lee, Hyesung Jo, Chaehwa Jeong, Tae-Gu Lee, Seunghwa Ryu , et al. · 2023

Journal Article Single-Atom Level Determination of 3-Dimensional Surface/Interface Atomic Structures via Deep Learning-Assisted Atomic Electron Tomography Get access Juhyeok Lee, Juhyeok Lee Department of Physics, Korea Advanced Institute …

Multislice Electron Tomography Using Four-Dimensional Scanning Transmission Electron Microscopy Open

Juhyeok Lee, Moosung Lee, YongKeun Park, Colin Ophus, Yongsoo Yang · 2023

Electron tomography offers useful three-dimensional (3D) structural information, which cannot be observed by two-dimensional imaging. By combining annular dark-field scanning transmission electron microscopy (ADF STEM) with aberration corr…

Revealing the Three-Dimensional Arrangement of Polar Topology in Nanoparticles Open

Chaehwa Jeong, Juhyeok Lee, Hyesung Jo, Jaewhan Oh, Hionsuck Baik , et al. · 2023

In the early 2000s, low dimensional systems were predicted to have topologically nontrivial polar structures, such as vortices or skyrmions, depending on mechanical or electrical boundary conditions. A few variants of these structures have…

Visualizing Heterogeneous Protein Conformations with Multi-Tilt Nanoparticle-Aided Cryo-Electron Microscopy Sampling Open

Changin Kim, Yeeun Kim, Sang Jin Lee, So Ri Yun, Jungkweon Choi , et al. · 2023

Obtaining the heterogeneous conformation of small proteins is important for understanding their biological role, but it is still challenging. Here, we developed a multi-tilt nanoparticle-aided cryo-electron microscopy sampling (MT-NACS) te…

Multislice Electron Tomography using 4D-STEM Open

Juhyeok Lee, Moosung Lee, YongKeun Park, Colin Ophus, Yongsoo Yang · 2022

Electron tomography offers important three-dimensional (3D) structural information which cannot be observed by two-dimensional imaging. By combining annular dark field scanning transmission electron microscopy (ADF-STEM) with aberration co…

Direct strain correlations at the single-atom level in three-dimensional core-shell interface structures Open

Hyesung Jo, Dae Han Wi, Tae-Gu Lee, Yongmin Kwon, Chaehwa Jeong , et al. · 2022

Critical ionic transport across an oxygen-vacancy ordering transition Open

Ji Soo Lim, Ho‐Hyun Nahm, Marco Campanini, Jounghee Lee, Yong-Jin Kim , et al. · 2022

Atomic-scale identification of the active sites of nanocatalysts Open

Yao Yang, Jihan Zhou, Zipeng Zhao, Geng Sun, Saman Moniri , et al. · 2022

Heterogeneous catalysts play a key role in the chemical and energy industries ¹ . To date, most industrial-scale heterogeneous catalytic reactions have relied on nanocatalysts ^2,3 . However, despite significant progre…

Direct strain correlations at the single-atom level in three-dimensional core-shell interface structures Open

Hyesung Jo, Dae Han Wi, Tae-Gu Lee, Yongmin Kwon, Chaehwa Jeong , et al. · 2022

The data and source codes for the paper [H.J., D.H.W., T.L., Y.K., C.J., J.L., H.B., A. J. P., W.T., C.O., P.E., Y.-L.L., S.R., S.W.H., and Y.Y., "Direct strain correlations at the single-atom level in three-dimensional core-shell interfac…

Direct strain correlations at the single-atom level in three-dimensional core-shell interface structures Open

Hyesung Jo, Dae Han Wi, Tae-Gu Lee, Yongmin Kwon, Chaehwa Jeong , et al. · 2022

The data and source codes for the paper [H.J., D.H.W., T.L., Y.K., C.J., J.L., H.B., A. J. P., W.T., C.O., P.E., Y.-L.L., S.R., S.W.H., and Y.Y., "Direct strain correlations at the single-atom level in three-dimensional core-shell interfac…

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