Hengge, K. A.; Scheu, C.: Novel electrodes for polymer based fuel cells. The 18th Israel Materials Engineering Conference (IMEC18), Dead Sea, Israel (2018)
Hengge, K.: TEM Tomography: Insights into the degradation of Pt/Ru fuel cell catalysts. 3D materials characterization at all length scales and its application to iron and steel, MPIE Düsseldorf, Düsseldorf, Germany (2017)
Hengge, K.; Heinzl, C.; Perchthaler, M.; Scheu, C.: Insights into degradation processes in WO3-x based anodes of HT-PEMFCs via electron microscopic techniques. Fuel Cells Science and Technology 2016 , Glasgow, Scotland, UK (2016)
Hengge, K.; Heinzl, C.; Perchthaler, M.; Welsch, M. T.; Scheu, C.: Template-free synthesized high surface area 3D networks of Pt on WO3-x – a promising alternative for H2 oxidation in fuel cell application. 2016 MRS Fall Meeting, Boston, MA, USA (2016)
Hengge, K.; Heinzl, C.; Perchthaler, M.; Scheu, C.: Electron microscopic insights into degradation processes in high temperature polymer electrolyte membrane fuel cells. Scandem 2015, Jyväskylä, Finland (2015)
Gänsler, T.; Hengge, K. A.; Scheu, C.: 3D Reconstruction of Identical Location Electron Micrographs – Methodology and Pitfalls. IAMNano 2019, International Workshop on Advanced and In-situ Microscopies of Functional Nanomaterials and Devices, Düsseldorf, Germany (2019)
Gänsler, T.; Hengge, K. A.; Beetz, M.; Pizzutilo, E.; Scheu, C.: Tracking the Degradation of Fuel Cell Catalyst Particles: 3D Reconstruction of Nanoscale Transmission Electron Micrographs. CINEMAX IV, "Best poster Award at the Summer School", Toreby, Denmark (2018)
Hengge, K.; Heinzl, C.; Perchthaler, M.; Welsche, M.; Scheu, C.: Material optimization for high-temperature polymer-electrolyte-membrane fuel cells. Material optimization for high-temperature polymer-electrolyte-membrane fuel cells, Duisburg, Germany (2016)
Hengge, K.; Heinzl, C.; Perchthaler, M.; Welsch, M. T.; Scheu, C.: Growth of novel Pt 3D networks on WO3-x electrodes and their effect on the performance of fuel cells. EMC 2016, 16th European Microscopy Congress, Lyon, France (2016)
Hengge, K.; Heinzl, C.; Perchthaler, M.; Scheu, C.: Electron microscopy studies of WO3-x based anodes for high temperature polymer electrolyte membrane fuel cells. IAM Nano 2015, Hamburg, Germany (2015)
Hengge, K.; Heinzl, C.; Perchthaler, M.; Scheu, C.: Degradation analysis of high temperature polymer electrolyte membrane fuel cells via electron microscopic techniques. TEM-UCA European Summer Workshop, Cadiz, Spain (2015)
Hengge, K.: Investigation of alternative catalyst and support materials and their effect on degradation in high-temperature polymer-electrolyte-membrane fuel cells. Dissertation, RWTH Aachen University, Aachen, Germany (2017)
Solitonic excitations with topological properties in charge density waves may be used as information carriers in novel types of information processing.
About 90% of all mechanical service failures are caused by fatigue. Avoiding fatigue failure requires addressing the wide knowledge gap regarding the micromechanical processes governing damage under cyclic loading, which may be fundamentally different from that under static loading. This is particularly true for deformation-induced martensitic…
In this project, we investigate the phase transformation and twinning mechanisms in a typical interstitial high-entropy alloy (iHEA) via in-situ and interrupted in-situ tensile testing ...
Low dimensional electronic systems, featuring charge density waves and collective excitations, are highly interesting from a fundamental point of view. These systems support novel types of interfaces, such as phase boundaries between metals and charge density waves.
Oxides find broad applications as catalysts or in electronic components, however are generally brittle materials where dislocations are difficult to activate in the covalent rigid lattice. Here, the link between plasticity and fracture is critical for wide-scale application of functional oxide materials.
In this project, we employ a metastability-engineering strategy to design bulk high-entropy alloys (HEAs) with multiple compositionally equivalent high-entropy phases.
The wide tunability of the fundamental electronic bandgap by size control is a key attribute of semiconductor nanocrystals, enabling applications spanning from biomedical imaging to optoelectronic devices. At finite temperature, exciton-phonon interactions are shown to exhibit a strong impact on this fundamental property.