Yoo, S.-H.: Overcoming failing Size Convergence for Surface Calculations of Materials Exhibiting Spontaneous Polarization. International Conference Materials Science and Engineering: Materials Oceania 2021, virtual, Brisbane City, Australia (2021)
Yoo, S.-H.: Electronic passivation schemes for surfaces with spontaneous polarization and for low symmetry semiconductor surfaces in DFT slab calculations. Materials Design Group Seminar, Department of Materials, Imperial College London, virtual, London, UK (2021)
Neugebauer, J.; Yoo, S.-H.; Lymperakis, L.: Ab initio insights into fundamental intrinsic growth and materials limitations in group-III-nitrides. MRS 2021 Fall Meeting, Virtual Conference, Boston, MA, USA (2021)
Yoo, S.-H.: Investigations of materials surfaces based on density functional theory calculations. Department of Chemistry seminar, virtual, Chuncheon, Republic of Korea (2020)
Todorova, M.; Yoo, S.-H.; Surendralal, S.; Neugebauer, J.: Insights into the stability and reactivity of solid/liquid interfaces from ab initio calculations. 71st Annual Meeting of the International Society of Electrochemistry "Electrochemistry towards Excellence", virtual, Belgrade, Serbia (2020)
Todorova, M.; Yoo, S.-H.; Surendralal, S.; Neugebauer, J.: Predicting atomic structure and chemical reactions at solid-liquid interfaces by first principles. Operando surface science – Atomistic insights into electrified solid/liquid interfaces (708. WE-Heraeus-Seminar), Physikzentrum, Bad Honnef, Germany (2019)
Todorova, M.; Yoo, S.-H.; Surendralal, S.; Neugebauer, J.: A fully ab initio approach to modelling electrochemical solid/liquid interfaces. Chemiekolloquium der Johannes Kepler Universität Linz, Linz, Austria (2019)
Todorova, M.; Yoo, S.-H.; Surendralal, S.; Neugebauer, J.: Modelling electrochemical solid/liquid interfaces by first principles calculations. 19th International Workshop on Computational Physics and Material Science: Total Energy and Force Methods, ICTP, Trieste, Italy (2019)
Yoo, S.-H.: Development of a computational framework to determine the chemical and thermodynamic stability of electrode materials in an electrochemical environment. Dissertation, Ruhr-Universität Bochum (2020)
Hydrogen in aluminium can cause embrittlement and critical failure. However, the behaviour of hydrogen in aluminium was not yet understood. Scientists at the Max-Planck-Institut für Eisenforschung were able to locate hydrogen inside aluminium’s microstructure and designed strategies to trap the hydrogen atoms inside the microstructure. This can…
Hydrogen induced embrittlement of metals is one of the long standing unresolved problems in Materials Science. A hierarchical multiscale approach is used to investigate the underlying atomistic mechanisms.
For understanding the underlying hydrogen embrittlement mechanism in transformation-induced plasticity steels, the process of damage evolution in a model austenite/martensite dual-phase microstructure following hydrogenation was investigated through multi-scale electron channelling contrast imaging and in situ optical microscopy.
We will investigate the electrothermomechanical response of individual metallic nanowires as a function of microstructural interfaces from the growth processes. This will be accomplished using in situ SEM 4-point probe-based electrical resistivity measurements and 2-point probe-based impedance measurements, as a function of mechanical strain and…
The project aims to study corrosion, a detrimental process with an enormous impact on global economy, by combining denstiy-functional theory calculations with thermodynamic concepts.
Hydrogen embrittlement affects high-strength ferrite/martensite dual-phase (DP) steels. The associated micromechanisms which lead to failure have not been fully clarified yet. Here we present a quantitative micromechanical analysis of the microstructural damage phenomena in a model DP steel in the presence of hydrogen.
This project will aim at developing MEMS based nanoforce sensors with capacitive sensing capabilities. The nanoforce sensors will be further incorporated with in situ SEM and TEM small scale testing systems, for allowing simultaneous visualization of the deformation process during mechanical tests
Nickel-based alloys are a particularly interesting class of materials due to their specific properties such as high-temperature strength, low-temperature ductility and toughness, oxidation resistance, hot-corrosion resistance, and weldability, becoming potential candidates for high-performance components that require corrosion resistance and good…
Understanding hydrogen-assisted embrittlement of advanced structural materials is essential for enabling future hydrogen-based energy industries. A crucially important phenomenon in this context is the delayed fracture in high-strength structural materials. Factors affecting the hydrogen embrittlement are the hydrogen content,...