ADVANCED ELECTRON
MICROSCOPY & FUNCTIONAL
IMAGING LABORATORY

Our research focuses on the application of aberration-corrected
STEM with emphasis on the unprecedented atomic scale imaging
techniques aimed at unraveling and understanding the various material
property-dependent device performance.

For several decades, studying materials microstructure was quite challenging as majority of the research works were theoretical. More importantly, providing direct evidence of the atomic scale evolution of material property was nearly impossible due to the limited analysis tools and techniques. However, with the invention of the new analysis and interpretational techniques, elucidating the correlation between material nanostructure and device characteristics has become crucial for the development of novel materials. Our research focuses on the application of aberration-corrected STEM with emphasis on the unprecedented atomic scale imaging techniques aimed at unraveling and understanding the various material property-dependent device performance. In-depth investigation of the various phenomena such as atomic-scale visualization of antisite defects such as those observed in LiFePO4 are tackled.

PUBLICATIONS

Kitae Eom, Bongwook Chung, Sehoon Oh, Hua Zhou, Jinsol Seo, Sang Ho Oh, Jinhyuk Jang, Si-Young Choi, Minsu Choi, Ilwan Seo, Yun Sang Lee, Youngmin Kim, Hyungwoo Lee, Jung-Woo Lee, Kyoungjun Lee, Mark Rzchowski, Chang-Beom Eom* and Jaichan Lee*, “Surface triggered stabilization of metastable charge-ordered phase in SrTiO3”, Nature Communications 15, 1180 (2024) [pdf]

  • Jung Woo Cho, Myeong Seop Song, In Hyeok Choi, Kyoung-June Go, Jaewoo Han, Tae Yoon Lee, Chihwan An, Hyung-Jin Choi, Changhee Sohn, Min Hyuk Park, Seung-Hyub Baek, Jong Seok Lee*, Si-Young Choi*, and Seung Chul Chae* († equally contributed authors), “Atomic Layer Deposition of Epitaxial Ferroelectric Hf0.5Zr0.5O2 Thin Films”, Advanced Functional Materials XX, 2314396 (2024) [pdf]

  • Odongo Francis Ngome Okello, Dong-Hwan Yang, Seung-Young Seo, Jewook Park, Gunho Moon, Dongwon Shin, Yu-Seong Chu, Sejung Yang, Teruyasu Mizoguchi, Moon-Ho Jo*, and Si-Young Choi* († equally contributed authors), “Atomistic Probing of Defect-Engineered 2H-MoTe2 Monolayers”, ACS Nano XX, XXXX (2024) [pdf]

  • So-Yeon Kim, Yu-Jeong Yang, Eun Gyu Lee, Min-Su Kim, Kyoung-June Go, Minseuk Kim, Gi-Yeop Kim, Sora Lee, Chiho Jo, Sungho Choi*, Si-Young Choi* († equally contributed authors), “Site selectivity of single dopant in high-nickel cathodes for lithium-ion batteries”, Chemical Engineering Journal 482, 148869 (2024) [pdf]

  • Lu Guo, Neil Campbell, Alexander J. Grutter, Gahee Noh, Tianxiang Nan, P. Quarterman, Si-Young Choi, Thomas Tybell, Mark S. Rzchowski, and Chang-Beom Eom*, “Tuning the magnetic anisotropy in artificially layered Mn3GaN/Mn3Ga superlattices”, Physical Review Materials 8, L011401 (2024) [pdf]