12 citations · 26 across the 22 of their papers we have counts for
22 papers
Specimen preparation for atom probe tomography analysis of complex multifunctional nanoparticles and nanostructures: state-of-the-art and challenges
Varatharaja Nallathambi, Se-Ho Kim, Nikita Polin +4
Atom probe tomography (APT) provides the three-dimensional composition of materials at near-atomic length scales, achieving detection limits in the range of tens of atomic parts-pe…
Kinetically controlling surface atom arrangements in thermally robust, amorphous high-entropy alloy nanoparticles by solvent selection
Varatharaja Nallathambi, Se-Ho Kim, Baptiste Gault +3
The ability to tailor nanoscale surface atom arrangements through multi-elemental compositional control provides high-entropy nanoalloys with promising functional properties. Devel…
Machine learning enhanced atom probe tomography analysis: a snapshot review
Yue Li, Ye Wei, Alaukik Saxena +3
Atom probe tomography (APT) is a burgeoning characterization technique that provides compositional mapping of materials in three-dimensions at near-atomic scale. Since its signific…
Advancing atom probe tomography capabilities to understand bone microstructures at the near-atomic scale
Tim M. Schwarz, Maïtena Dumont, Victoria Garcia-Giner +3
Bone structure is generally hierarchically organized into organic (collagen, proteins,...), inorganic (hydroxyapatite (HAP)) components. However, many fundamental mechanisms of the…
Kinetics and direct imaging of electrochemically formed palladium hydride for efficient hydrogen evolution reaction
Luca Camuti, Se-Ho Kim, Filip Podjaski +8
Active and reliable electrocatalysts are fundamental to renewable energy technologies. PdCoO2 has recently been recognized as a promising catalyst template for the hydrogen evoluti…
Electric Field-Induced Formation of a 2D Adatom Gas on Cryogenic Li Surfaces
Shyam Katnagallu, Huan Zhao, Se-Ho Kim +3
Intense electrostatic fields, such as those able to break bonds and cause field-ion emission, can fundamentally alter the behaviour of atoms at and on the surface. Using density fu…
Magnetocaloric effect of Fe47.5Ni37.5Mn15 bulk and nanoparticles: A cost-efficient alloy for room temperature magnetic refrigeration
Chang-Gi Lee, Varatharaja Nallathambi, TaeHyeok Kang +6
The development of magnetic refrigerators that operate at room temperature without the use of environmentally harmful substances represents a significant advancement in eco-friendl…
An atomic-scale view at Fe4N as hydrogen barrier material
Aleksander Albrecht, Sang Yoon Song, Chang-Gi Lee +9
Hydrogen, while a promising sustainable energy carrier, presents challenges such as the embrittlement of materials due to its ability to penetrate and weaken their crystal structur…
Formation of cellular/lamellar nanostructure in SmCo-type binary and ternary Sm-Co-Zr magnets
Nikita Polin, Konstantin P. Skokov, Alex Aubert +6
2:17 SmCo magnets with a quinary composition of Sm(Co,Cu,Fe,Zr) are industrially relevant hard magnets used in high temperature and corrosive environments. Their complex ce…
Understanding High Coercivity in ThMn12-Type Sm-Zr-Fe-Co-Ti Permanent Magnet Powders through Nanoscale Analysis
Nikita Polin, Alexander M. Gabay, Chaoya Han +6
ThMn12-type (Sm,Zr)1(Fe,Co,Ti)12 compounds show great potential for permanent magnets. Magnetically hard anisotropic powders prepared via reduction-diffusion exhibit a significant…
Stacking fault segregation imaging with analytical field ion microscopy
F. F. Morgado, L. T. Stephenson, S. Bhatt +8
Stacking faults (SF) are important structural defects that play an essential role in the deformation of engineering alloys. However, direct observation of stacking faults at the at…
Grain boundaries control lithiation of solid solution substrates in lithium metal batteries
Leonardo Shoji Aota, Chanwon Jung, Siyuan Zhang +9
The development of sustainable transportation and communication systems requires an increase in both energy density and capacity retention of Li-batteries. Using substrates forming…
Mapping the path to Cryogenic Atom Probe Tomography Analysis of biomolecules
Eric V. Woods, Tim M. Schwarz, Mahander P. Singh +7
The understanding of protein structure, folding, and interaction with other proteins remains one of the grand challenges of modern biology. Tremendous progress has been made thanks…
Impurities, or dopants, that is the question
Baptiste Gault, Leonardo Shoji Aota, Mathias Krämer +1
The numerous stories around LK-99 as a possible room-temperature superconductor over the summer of 2023 epitomise that materials are more than a bulk crystallographic structure or…
Analysis of water ice in nanoporous copper needles using cryo atom probe tomography
Levi Tegg, Ingrid E. McCarroll, Se-Ho Kim +5
The application of atom probe tomography (APT) to frozen liquids is limited by difficulties in specimen preparation. Here, we report on the use of nanoporous Cu needles as a physic…
Understanding atom probe's analytical performance for iron oxides using correlation histograms and ab initio calculations
Se-Ho Kim, Shalini Bhatt, Daniel K. Schreiber +4
Field evaporation from ionic or covalently bonded materials often leads to the emission of molecular ions. The metastability of these molecular ions, particularly under the influen…
Facilitating Atom Probe Tomography of 2D MXene Films by In Situ Sputtering
Mathias Krämer, Bar Favelukis, Maxim Sokol +4
2D materials are emerging as promising nanomaterials for applications in energy storage and catalysis. In the wet chemical synthesis of MXenes, these 2D transition metal carbides a…
Nanoporous gold thin films as substrates to analyze liquids by cryo-atom probe tomography
E. V. Woods, A. Saksena, A. A. El-Zoka +7
Cryogenic atom probe tomography (cryo-APT) is being developed to enable nanoscale compositional analyses of frozen liquids. Yet, the availability of readily available substrates th…
Spatially resolving superconductivity in type-II superconductors
Donald M. Evans, Michele Conroy, Lukas Puntigam +6
Superconductivity is identified by the emergence of a macroscopic zero-resistance state, typically inferred from a vanishing four-probe voltage at finite current. That inference as…
Facilitating the systematic nanoscale study of battery materials by atom probe tomography through in-situ metal coating
Mahander P Singh, Eric V Woods, Se Ho Kim +3
Through its capability for 3D mapping of Li at the nanoscale, atom probe tomography (APT) is poised to play a key role in understanding the microstructural degradation of lithium-i…
In-situ metallic coating of atom probe specimen for enhanced yield, performance, and increased field-of-view
Tim M. Schwarz, Eric Woods, Mahander P. Singh +7
Atom probe tomography requires needle-shaped specimens with a diameter typically below 100 nm, making them both very fragile and reactive, and defects (notches at grain boundaries…
Interstitial segregation has the potential to mitigate liquid metal embrittlement in iron
Ali Ahmadian, Daniel Scheiber, Xuyang Zhou +6
The embrittlement of metallic alloys by liquid metals leads to catastrophic material failure and severely impacts their structural integrity. The weakening of grain boundaries by t…