370 citations · 1k across the 16 of their papers we have counts for
17 papers
Crystal nucleation and growth in high-entropy alloys revealed by atomic electron tomography
Yakun Yuan, Saman Moniri, Yao Yang +8
High-entropy alloys (HEAs) balance mixing entropy and intermetallic phase formation enthalpy, creating a vast compositional space for structural and functional materials (1-6). The…
Revealing the Three-Dimensional Arrangement of Polar Topology in Nanoparticles
Chaehwa Jeong, Juhyeok Lee, Hyesung Jo +8
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 b…
Multislice Electron Tomography using 4D-STEM
Juhyeok Lee, Moosung Lee, YongKeun Park +2
Electron tomography offers important three-dimensional (3D) structural information which cannot be observed by two-dimensional imaging. By combining annular dark field scanning tra…
Revealing 3-dimensional core-shell interface structures at the single-atom level
Hyesung Jo, Dae Han Wi, Taegu Lee +12
Nanomaterials with core-shell architectures are prominent examples of strain-engineered materials, where material properties can be designed by fine-tuning the misfit strain at the…
Atomic-scale identification of the active sites of nanocatalysts
Yao Yang, Jihan Zhou, Zipeng Zhao +15
Alloy nanocatalysts have found broad applications ranging from fuel cells to catalytic converters and hydrogenation reactions. Despite extensive studies, identifying the active sit…
Direct observation of three-dimensional atomic structure of twinned metallic nanoparticles and their catalytic properties
Juhyeok Lee, Chaehwa Jeong, Yongsoo Yang
We determined a full 3D atomic structure of a dumbbell-shaped Pt nanoparticle formed by a coalescence of two nanoclusters using deep learning assisted atomic electron tomography. F…
Single-atom level determination of 3-dimensional surface atomic structure via neural network-assisted atomic electron tomography
Juhyeok Lee, Chaehwa Jeong, Yongsoo Yang
Functional properties of nanomaterials strongly depend on their surface atomic structure, but they often become largely different from their bulk structure, exhibiting surface reco…
Correlating 3D atomic defects and electronic properties of 2D materials with picometer precision
Xuezeng Tian, Dennis S. Kim, Shize Yang +10
The exceptional electronic, optical and chemical properties of two-dimensional materials strongly depend on the 3D atomic structure and crystal defects. Using Re-doped MoS2 as a mo…
Capturing Nucleation at 4D Atomic Resolution
Jihan Zhou, Yongsoo Yang, Yao Yang +12
Nucleation plays a critical role in many physical and biological phenomena ranging from crystallization, melting and evaporation to the formation of clouds and the initiation of ne…
GENFIRE: A generalized Fourier iterative reconstruction algorithm for high-resolution 3D imaging
Alan Pryor, Yongsoo Yang, Arjun Rana +7
Tomography has made a radical impact on diverse fields ranging from the study of 3D atomic arrangements in matter to the study of human health in medicine. Despite its very diverse…
Single-Shot 3D Diffractive Imaging of Core-Shell Nanoparticles with Elemental Specificity
Alan Pryor, Arjun Rana, Rui Xu +26
We report 3D coherent diffractive imaging of Au/Pd core-shell nanoparticles with 6 nm resolution on 5-6 femtosecond timescales. We measured single-shot diffraction patterns of core…
Deciphering chemical order/disorder and material properties at the single-atom level
Yongsoo Yang, Chien-Chun Chen, M. C. Scott +13
Correlating 3D arrangements of atoms and defects with material properties and functionality forms the core of several scientific disciplines. Here, we determined the 3D coordinates…
Nanomaterial datasets to advance tomography in scanning transmission electron microscopy
Barnaby D. A. Levin, Elliot Padgett, Chien-Chun Chen +17
Electron tomography in materials science has flourished with the demand to characterize nanoscale materials in three dimensions (3D). Access to experimental data is vital for devel…
Three-dimensional coordinates of individual atoms in materials revealed by electron tomography
Rui Xu, Chien-Chun Chen, Li Wu +11
Crystallography, the primary method for determining the three-dimensional (3D) atomic positions in crystals, has been fundamental to the development of many fields of science. Howe…
Determination of Intrinsic Ferroelectric Polarization in Orthorhombic Manganites with E-type Spin Order
Y. S. Chai, Y. S. Oh, L. J. Wang +6
By directly measuring electrical hysteresis loops using the Positive-Up Negative-Down (PUND) method, we accurately determined the remanent ferroelectric polarization Pr of orthorho…
Presence of a (1x1) oxygen overlayer on bare ZnO(0001) surfaces and at Schottky interfaces
Christian M. Schlepütz, Yongsoo Yang, Naji S. Husseini +5
The atomic surface and interface structure of bare and metal-coated ZnO(0001) Zn-polar wafers were investigated via surface x-ray diffraction. All bare samples showed the presence…
Determination of the intrinsic ferroelectric polarization in orthorhombic HoMnO3
S M Feng, Y S Chai, J L Zhu +6
Whether large ferroelectric polarization P exists in the orthorhombic HoMnO3 with the E-type antiferromagnetic spin ordering or not remains as one of unresolved, challenging issues…