@article{ryu2026concurrent,title={Resolving nanoscale heterogeneities in lead halide perovskites through low dose concurrent {4D-STEM-EDX} mapping},author={Ryu, J. and Sheader, A. A. and Danaie, M. and Hopkinson, D. G. and MacArthur, K. E. and Noel, N. K. and Allen, C. S.},journal={Advanced Materials},year={2026},doi={10.1002/adma.74382},}
Dynamics of dislocation formations and their impacts on exsolution in Ru-doped perovskite oxide
S. Choi†, Y. Lim†, P. Guha, H. Kim, J. Kim, S. Kim, R. Harder, W. Cha, H. Suh, J. Ryu, S. Yang, H. I. Ji*, D. H. Kwon*, and H. Kim*
@article{choi2026dislocation,title={Dynamics of dislocation formations and their impacts on exsolution in {Ru}-doped perovskite oxide},author={Choi, S. and Lim, Y. and Guha, P. and Kim, H. and Kim, J. and Kim, S. and Harder, R. and Cha, W. and Suh, H. and Ryu, J. and Yang, S. and Ji, H. I. and Kwon, D. H. and Kim, H.},journal={Nature Communications},volume={17},number={1},year={2026},doi={10.1038/s41467-026-73457-7}}
4D-STEM Nanoscale Phase Mapping of the Solid-Electrolyte Interphase
Y. Xu†, J. Ryu, B. Jagger, J. Zhao, M. Pasta*, and C. S. Allen*
@article{xu2026phase,title={{4D-STEM} Nanoscale Phase Mapping of the Solid-Electrolyte Interphase},author={Xu, Y. and Ryu, J. and Jagger, B. and Zhao, J. and Pasta, M. and Allen, C. S.},journal={ChemRxiv},note={Preprint},year={2026},doi={10.26434/chemrxiv.15000589/v1}}
In situ transmission electron microscopy visualization of electric-field-induced phase transitions at the morphotropic phase boundary in Hf0.5Zr0.5O2
S. Lee†, S. Kim†, J. Ryu†, J. Lee, J. Hong, J. E. Kim, J.-Y. Cha, Y. Shin, D. Kwon, J. H. Yoon, M. H. Park, M. Kim*, and S.-Y. Lee*
@article{lee2026insitu,title={In situ transmission electron microscopy visualization of electric-field-induced phase transitions at the morphotropic phase boundary in {Hf0.5Zr0.5O2}},author={Lee, S. and Kim, S. and Ryu, J. and Lee, J. and Hong, J. and Kim, J. E. and Cha, J.-Y. and Shin, Y. and Kwon, D. and Yoon, J. H. and Park, M. H. and Kim, M. and Lee, S.-Y.},journal={ACS Nano},volume={20},number={8},pages={6757--6766},year={2026},doi={10.1021/acsnano.5c15856}}
A hierarchical shell locks and stabilizes perovskite nanocrystals with near-unity quantum yield
Q. Zeng†, Y. Zhao, S. Park, H. Zhou, H.-J. Shim, T. Li, J. Ryu, M.-J. Sung, X. W. Chua, E. Yoon, B. A. I. Lewis, S.-J. Woo, M. Forzatti, M. J. Kim, E. A. Kim, L. Dai, J. Jang, Y. Tang, J. J. Kweon, and T.-W. Lee*
@article{zeng2026shell,title={A hierarchical shell locks and stabilizes perovskite nanocrystals with near-unity quantum yield},author={Zeng, Q. and Zhao, Y. and Park, S. and Zhou, H. and Shim, H.-J. and Li, T. and Ryu, J. and Sung, M.-J. and Chua, X. W. and Yoon, E. and Lewis, B. A. I. and Woo, S.-J. and Forzatti, M. and Kim, M. J. and Kim, E. A. and Dai, L. and Jang, J. and Tang, Y. and Kweon, J. J. and Lee, T.-W.},journal={Science},volume={391},number={6782},year={2026},doi={10.1126/science.ady1370}}
2025
Spatio-Compositional Characterization of the Solid Electrolyte Interphase in Solid-State Batteries via Nanobeam Electron Diffraction Microscopy
J. Ihli*, Y. Chart†, J. Ryu, Y. Liang, P. Y. Huang, H. Guo, D. G. Hopkinson, G. Hughes, Y. Xu, M. Pasta, and C. S. Allen*
@article{ihli2025sei,title={Spatio-Compositional Characterization of the Solid Electrolyte Interphase in Solid-State Batteries via Nanobeam Electron Diffraction Microscopy},author={Ihli, J. and Chart, Y. and Ryu, J. and Liang, Y. and Huang, P. Y. and Guo, H. and Hopkinson, D. G. and Hughes, G. and Xu, Y. and Pasta, M. and Allen, C. S.},journal={Research Square},note={Preprint},year={2025},doi={10.21203/rs.3.rs-7898763/v1}}
Sulfur-bearing serpentine in carbonaceous chondrites
N. Topping†*, J. C. Bridges, L. J. Hicks, L. Petera, C. S. Allen, J. Ryu, D. G. Hopkinson, M. Danaie, L. Blase, F. M. Willcocks, G. Douglas, H. G. Changela, T. Noguchi, T. Matsumoto, and A. Miyake
@article{topping2025serpentine,title={Sulfur-bearing serpentine in carbonaceous chondrites},author={Topping, N. and Bridges, J. C. and Hicks, L. J. and Petera, L. and Allen, C. S. and Ryu, J. and Hopkinson, D. G. and Danaie, M. and Blase, L. and Willcocks, F. M. and Douglas, G. and Changela, H. G. and Noguchi, T. and Matsumoto, T. and Miyake, A.},journal={Meteoritics \& Planetary Science},year={2025},doi={10.1111/maps.70069}}
Variable-range hopping conduction in amorphous, non-stoichiometric gallium oxide
P. Hein†, T. Romstadt, F. Draber, J. Ryu, T. Boeger, A. Falkenstein, M. Kim, and M. Martin*
@article{hein2025hopping,title={Variable-range hopping conduction in amorphous, non-stoichiometric gallium oxide},author={Hein, P. and Romstadt, T. and Draber, F. and Ryu, J. and Boeger, T. and Falkenstein, A. and Kim, M. and Martin, M.},journal={Advanced Electronic Materials},volume={11},number={4},year={2025},doi={10.1002/aelm.202400407}}
@article{kim2024in2te3,title={Molecular beam epitaxial {In2Te3} electronic devices},author={Kim, I. and Ryu, J. and Lee, E. and Lee, S. and Lee, S. and Suh, W. and Lee, J. and Kim, M. and Oh, H. S. and Yi, G.-C.},journal={NPG Asia Materials},volume={16},number={1},year={2024},doi={10.1038/s41427-024-00578-0}}
Direct three-dimensional observation of the plasmonic near-fields of a nanoparticle with circular dichroism
J. Jo†, J. Ryu†, J. H. Huh, H. Kim, D. H. Seo, J. Lee, M. Kwon, S. Lee*, K. T. Nam*, and M. Kim*
@article{jo2024plasmonic,title={Direct three-dimensional observation of the plasmonic near-fields of a nanoparticle with circular dichroism},author={Jo, J. and Ryu, J. and Huh, J. H. and Kim, H. and Seo, D. H. and Lee, J. and Kwon, M. and Lee, S. and Nam, K. T. and Kim, M.},journal={ACS Nano},volume={18},number={47},pages={32769--32780},year={2024},doi={10.1021/acsnano.4c10677}}
2023
Iridium-cooperated, symmetry-broken manganese oxide nanocatalyst for water oxidation
S. Park†, T. Jang†, S. Choi†, Y. H. Lee, K. H. Cho, M. Y. Lee, H. Seo, H. K. Lim, Y. Kim, J. Ryu, S. W. Im, M. G. Kim, J. S. Park, M. Kim, K. Jin, S. H. Kim, G. S. Park, H. Kim, and K. T. Nam*
@article{park2023iridium,title={Iridium-cooperated, symmetry-broken manganese oxide nanocatalyst for water oxidation},author={Park, S. and Jang, T. and Choi, S. and Lee, Y. H. and Cho, K. H. and Lee, M. Y. and Seo, H. and Lim, H. K. and Kim, Y. and Ryu, J. and Im, S. W. and Kim, M. G. and Park, J. S. and Kim, M. and Jin, K. and Kim, S. H. and Park, G. S. and Kim, H. and Nam, K. T.},journal={Journal of the American Chemical Society},volume={145},number={49},pages={26632--26644},year={2023},doi={10.1021/jacs.3c07411}}
Boron-doped amorphous carbon deposited by DC sputtering for a hardmask: Microstructure and dry etching properties
S. Kim†, U.-g. Kim, J. Ryu, D. Kim, M. Kim, Y.-C. Joo, and S.-Y. Lee*
@article{kim2023boron,title={Boron-doped amorphous carbon deposited by {DC} sputtering for a hardmask: Microstructure and dry etching properties},author={Kim, S. and Kim, U.-g. and Ryu, J. and Kim, D. and Kim, M. and Joo, Y.-C. and Lee, S.-Y.},journal={Applied Surface Science},volume={637},year={2023},doi={10.1016/j.apsusc.2023.157895}}
2022
Overcharge-induced phase heterogeneity and resultant twin-like layer deformation in lithium cobalt oxide cathode for lithium-ion batteries
J. Oh†, S. Y. Lee, H. Kim, J. Ryu, B. Gil, J. Lee, and M. Kim*
@article{oh2022overcharge,title={Overcharge-induced phase heterogeneity and resultant twin-like layer deformation in lithium cobalt oxide cathode for lithium-ion batteries},author={Oh, J. and Lee, S. Y. and Kim, H. and Ryu, J. and Gil, B. and Lee, J. and Kim, M.},journal={Advanced Science},volume={9},number={32},pages={e2203639},year={2022},doi={10.1002/advs.202203639}}
Atomic reconstruction and oxygen evolution reaction of Mn3O4 nanoparticles
S. Yoon†, H. Seo, K. Jin, H. G. Kim, S. Y. Lee, J. Jo, K. H. Cho, J. Ryu, A. Yoon, Y. W. Kim, J. M. Zuo, Y. K. Kwon, K. T. Nam, and M. Kim*
@article{yoon2022atomic,title={Atomic reconstruction and oxygen evolution reaction of {Mn3O4} nanoparticles},author={Yoon, S. and Seo, H. and Jin, K. and Kim, H. G. and Lee, S. Y. and Jo, J. and Cho, K. H. and Ryu, J. and Yoon, A. and Kim, Y. W. and Zuo, J. M. and Kwon, Y. K. and Nam, K. T. and Kim, M.},journal={The Journal of Physical Chemistry Letters},volume={13},number={35},pages={8336--8343},year={2022},doi={10.1021/acs.jpclett.2c01638}}
Correlative study between the local atomic and electronic structures of amorphous carbon materials via 4D-STEM and STEM-EELS
@article{ryu2022correlative,title={Correlative study between the local atomic and electronic structures of amorphous carbon materials via {4D-STEM} and {STEM-EELS}},author={Ryu, J. and Lee, S. and Kim, S. and Joo, Y.-C. and Kim, M.},journal={Applied Physics Letters},volume={121},number={4},year={2022},doi={10.1063/5.0100925},}
2021
Dimensionality reduction and unsupervised clustering for EELS-SI
J. Ryu†, H. Kim, R. M. Kim, S. Kim, J. Jo, S. Lee, K. T. Nam, Y. C. Joo, G. C. Yi, J. Lee, and M. Kim*
@article{ryu2021dimensionality,title={Dimensionality reduction and unsupervised clustering for {EELS-SI}},author={Ryu, J. and Kim, H. and Kim, R. M. and Kim, S. and Jo, J. and Lee, S. and Nam, K. T. and Joo, Y. C. and Yi, G. C. and Lee, J. and Kim, M.},journal={Ultramicroscopy},volume={231},pages={113314},year={2021},doi={10.1016/j.ultramic.2021.113314},}