Publications (11)
Ultrastrong and ductile CoNiMoAl medium-entropy alloys enabled by L12 nanoprecipitate-induced multiple deformation mechanisms
Min Young Sung, Tae Jin Jang, Sang Yoon Song +11
L12 precipitates are known to significantly enhance the strength and ductility of single-phase face-centered cubic (FCC) medium- or high-entropy alloys (M/HEAs). However, further i…
Characterization of Pd and Pd@Au core-shell nanoparticles using atom probe tomography and field evaporation simulation
Se-Ho Kim, Kyuseon Jang, Phil Woong Kang +6
We report on atom probe tomography analyses of Pd and Pd@Au nanoparticles embedded in a Ni matrix and the effects of local evaporation field variations on the atom probe data. In o…
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…
Exploring the Surface Segregation of Rh Dopant in PtNi Nanoparticles through Atom Probe Tomography Analysis
Se-Ho Kim, Hosun Jun, Kyuseon Jang +3
Proton exchange membrane fuel cells hold promise as energy conversion devices for hydrogen-based power generation and storage. However, the slow kinetics of the oxygen reduction at…
Guided mass spectrum labelling in atom probe tomography
Daniel Haley, Pyuck-Pa Choi, Dierk Raabe
Atom probe tomography (APT) is a valuable near-atomic scale imaging technique, which yields mass spectrographic data. Experimental correctness can often pivot on the identification…
Finely Tunable Thermal Expansion of NiTi by Stress-Induced Martensitic Transformation and Thermomechanical Training
Won Seok Choi, Won-Seok Ko, Yejun Park +6
Tailoring the thermal expansion of martensitic materials by crystallographic texture and anisotropic variation of lattice parameters is a promising route to a flexible design of th…
Tracking the Mn diffusion in the carbon-supported nanoparticles through the collaborative analysis of atom probe and evaporation simulation
Chanwon Jung, Hosun Jun, Kyuseon Jang +2
Carbon-supported nanoparticles have been used widely as efficient catalysts due to their enhanced surface-to-volume ratio. To investigate their structure-property relationships, ac…
Three-dimensional Atomic Mapping of Ligands on Nanoparticles
Kyuseon Jang, Se-Ho Kim, Hosun Jun +4
Capping ligands are crucial to synthesize colloidal nanoparticles with novel functional properties. However, the interaction between capping ligands and their interaction with the…
Atomic scale mapping of impurities in partially reduced hollow TiO2 nanowires
Joohyun Lim, Se-Ho Kim, Raquel Aymerich Armengol +5
The incorporation of impurities during the chemical synthesis of nanomaterials is usually uncontrolled and rarely reported because of the formidable challenge that constitutes meas…
Unraveling the Metastability of C_n^{2+} (n=2-4) Clusters
Zirong Peng, David Zanuttini, Benoit Gervais +6
Pure carbon clusters have received considerable attention for a long time. However, fundamental questions such as what the smallest stable carbon cluster dication is remain unclear…
On the spheroidized carbide dissolution and elemental partitioning in a high carbon bearing steel 100Cr6
Wenwen Song, Pyuck-Pa Choi, Gerhard Inden +3
We report on the characterization of high carbon bearing steel 100Cr6 using electron microscopy and atom probe tomography in combination with multi-component diffusion simulations…