Neelakantan, L.; Valtiner, M.; Eggeler, G.; Hassel, A. W.: Surface chemistry and topographical changes of an electropolished NiTi shape memory alloy. Workshop on Engineering of Functional Interfaces, Hasselt Univ, Campus Diepenbeek, Diepenbeek, BELGIUM, June 18, 2009 - June 19, 2009. Physica Status Solidi A-Applications and Materials Science 207 (4), pp. 807 - 811 (2010)
Valtiner, M.; Grundmeier, G.: In-situ AFM study of the crystallization and pH-dependent stability of ZnO(0001)-Zn surfaces. 2007 MRS Fall Meeting, Boston MA, USA, November 26, 2007 - November 30, 2007. Materials Research Society Symposium Proceedings 1035, pp. 35 - 39 (2008)
Valtiner, M.: Force probe experiments to elucidate structure and dynamics at electrified and hydrated interfaces. Seminar AK Butt/ AK Palberg, MPI-P , Mainz, Germany (2014)
Valtiner, M.: The electrochemical surface force apparatus: From surface forces to nanoscale real-time imaging of electrochemical reactions at confined interfaces. Gordon Research Conference: Corrosion - Aqueous, New London, NH, USA (2012)
Valtiner, M.; Kristiansen, K.; Greene, G. W.; Israelachvili, J. N.: Surface and Interface Forces between Dissimilar Surfaces in Aqueous Solution: The Effect of Electrochemical Surface Potentials, Surface Roughness and Hydration Layers. AVS 58th Intl. Symposium & Exhibition, Nashville, TN, USA (2011)
Valtiner, M.; Kristiansen, K.; Greene, G. W.; Israelachvili, J. N.: Novel Electrochemical Surface Forces Apparatus and Electrochemical AFM Setups for the Study of Interfacial Phenomena. AICHE Annual Meeting, Minneapolis, MN, USA (2011)
Valtiner, M.; Kristiansen, K.; Greene, G. W.; Israelachvili, J. N.: Forces between dissimilar surfaces in aqueous solution: The effect of electrochemical surface potentials, surface roughness and hydration layers. 14th International Conference on Applications of Surfaces and Interface Analysis (ECASIA'11), Cardiff, Wales, UK (2011)
Todorova, M.; Valtiner, M.; Neugebauer, J.: Hydrogen adsorption on polar ZnO(0001)–Zn - Extending equilibrium surface phase diagrams to kinetically stabilised structures. March meeting of the American Physical Society (APS), Dallas, TX, USA (2011)
Valtiner, M.: Single Molecules as Sensors for Local Molecular Interactions at Oxide/Liquid Interface. LB13 13th Intl. Conference on Organized Molecular Films, Québec, Canada (2010)
Möllmann, V.; Keil, P.; Valtiner, M.; Wagner, R.; Lützenkirchen-Hecht, D.; Frahm, R.; Grundmeier, G.: Structural properties of Ag@TiO2 nanocomposites measured by means of refection mode XAS measurements at beamline 8. Fourth DELTA user meeting, Dortmund, Germany (2008)
Fink, N.; Valtiner, M.; Klimow, G.; Grundmeier, G.: Investigation of forming behaviour of ultra-thin hybrid conversion layers on zinc coated steel. The 59th Annual Meeting of the International Society of Electrochemistry, Seville, Spain (2008)
Valtiner, M.; Grundmeier, G.: Acidic Dissolution Mechanism, pH-dependent Stability and Adhesion of Single Molecules on Single Crystalline ZnO(0001)-Zn Model Surfaces Studied by in-situ AFM and DFT Simulations. Euradh 2008 - Adhesion '08, St Catherine's College, Oxford, UK (2008)
Valtiner, M.; Grundmeier, G.: Acidic dissolution mechanism, pH-dependent stability and adhesion of single molecules studied on single crystalline ZnO(0001)–Zn model surfaces by in-situ AFM studies. Gordon Conference Graduate Research Seminar on Aqueous Corrosion, Colby Sawyer College, New London, NH, USA (2008)
Zuo, J.; Keil, P.; Valtiner, M.; Thissen, P.; Grundmeier, G.: Ag nanostructures on fluoroalkylsilane self assembled monolayers: The dependence on perfluoroalkyl chain length. The 9th International Conference on Nanostructured Materials, Rio de Janeiro, Brazil (2008)
Grundmeier, G.; Valtiner, M.; Vlasak, R.: Adhesion promoting films and monolayers at polymer/oxide/metal interfaces. NACE2008 RIP Session Coatings and Inhibitors, New Orleans, LA, USA (2008)
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…
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…
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.
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
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.
Thermo-chemo-mechanical interactions due to thermally activated and/or mechanically induced processes govern the constitutive behaviour of metallic alloys during production and in service. Understanding these mechanisms and their influence on the material behaviour is of very high relevance for designing new alloys and corresponding…
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…