A5003974553- Integrated Circuits and Semiconductor Failure Analysis
- Semiconductor materials and devices
- Advanced Surface Polishing Techniques
- Copper Interconnects and Reliability
- Electron and X-Ray Spectroscopy Techniques
- Advanced Electron Microscopy Techniques and Applications
- Diatoms and Algae Research
- Advancements in Photolithography Techniques
- Advanced X-ray Imaging Techniques
- Advanced ceramic materials synthesis
- Metal and Thin Film Mechanics
- Electronic Packaging and Soldering Technologies
- Graphene research and applications
- Paleontology and Stratigraphy of Fossils
- 3D IC and TSV technologies
- Semiconductor materials and interfaces
- Electrocatalysts for Energy Conversion
- Calcium Carbonate Crystallization and Inhibition
- Diamond and Carbon-based Materials Research
- Machine Learning in Materials Science
- Corrosion Behavior and Inhibition
- Advanced Battery Technologies Research
- Glass properties and applications
- Nanofluid Flow and Heat Transfer
- Advancements in Solid Oxide Fuel Cells
Fraunhofer Institute for Ceramic Technologies and Systems
2015-2024
TU Dresden
2013-2016
Fraunhofer Institute for Manufacturing Technology and Advanced Materials
2013-2014
Fraunhofer Institute for Nondestructive Testing
2013
Leibniz Institute for Solid State and Materials Research
2009-2011
Leibniz Association
2011
Abstract The mechanical response of patterned graphene nanoribbons (GNRs) with a width less than 100 nm was studied in - situ using quantitative tensile testing transmission electron microscope (TEM). A high degree crystallinity confirmed for before and after the experiment by selected area diffraction (SAED) patterns. However, maximum local true strain determined to be only about 3%. simultaneously recorded low-loss energy loss spectrum (EELS) on stretched did not reveal any bandgap...
The mechanical properties such as compressive strength and nanohardness were investigated for Pinctada margaritifera mollusk shells. was evaluated through a uniaxial static compression test performed along the load directions parallel perpendicular to shell axis, respectively, while hardness Young modulus measured using nanoindentation. In order observe crack propagation, first time material, in-situ X-ray microscopy (nano-XCT) imaging (together with 3D reconstruction based on acquired...
Abstract The diatom shell is an example of complex siliceous structure which a suitable model to demonstrate the process digging into third dimension using modern visualization techniques. This paper demonstrates importance comprehensive multi-length scale approach bio-structures/materials with usage state-of-the-art imaging Imaging diatoms applying visible light, electron and X-ray microscopy provide deeper insight morphology their frustules.
Diatom frustules, with their hierarchical three-dimensional patterned silica structures at nano to micrometer dimensions, can be a paragon for the design of lightweight structural materials. However, mechanical properties especially species pennate symmetry, have not been studied systematically. A novel approach combining in situ micro-indentation and high-resolution X-ray computed tomography (XCT)-based finite element analysis (FEA) identical sample is developed applied Didymosphenia...
Point focusing measurements using pairs of directly bonded crossed multilayer Laue lenses (MLLs) are reported. Several flat and wedged MLLs have been fabricated out a single deposition assembled to realise point devices. The manufactured by adding stress layer onto lenses. Subsequent bending the structure changes relative orientation interfaces towards stress-wedged geometry. characterization at ESRF beamline ID13 photon energy 10.5 keV demonstrated nearly diffraction-limited clean spot 43...
For the first time, three-dimensional (3D) internal structure of naturally produced Didymosphenia geminata frustules were nondestructively visualized at sub-100 nm resolution. The well-optimized hierarchical structures these natural organisms provide insight that is needed to design novel, environmentally friendly functional materials. Diatoms, which are widely distributed in freshwater, seawater and wet soils, well known for their intricate, siliceous cell walls called 'frustules'. Each...
PECVD and PEALD of ruthenium films using RuEtcp2 as a precursor N2/H2/Ar plasma reducing agent were characterized. A self-adjusting process to overcome the previously reported inhibition Ru on TaN substrates was investigated. Ellipsometric modelling demonstrated providing information both film thickness estimated content. The physical properties PECVD/PEALD compared characteristics sputtered within categories resistivity, impurites, crystal structure, conformity Cu plating. As result,...
Abstract Diatom frustules, with their diverse three-dimensional regular silica structures and nano- to micrometer dimensions, represent perfect model systems for biomimetic fabrication of materials devices. The structure a frustule the diatom Didymosphenia geminata was nondestructively visualized using nano X-ray computed tomography (XCT) transferred into CAD file first time. Subsequently, this used as input an engineered object, which manufactured by applying additive manufacturing...
The influence of the various content multilayered graphene (MLG) on structural and mechanical properties final bulk porous silicon nitride-zirconia (Si3N4-ZrO2) based ceramics was investigated. ceramic composites were prepared in form laminated structure with different (5-30-5 wt% 30-5-30 wt%) MLG by hot isostatic pressing. Homogeneous distribution MLGs, a completed phase transition from α to β-Si3N4 case 5 have been observed. examinations revealed that zirconia particles owing their sizes...
Abstract For a systematic materials selection and for design synthesis of systems electrochemical energy conversion with specific properties, it is essential to clarify the general relationship between physicochemical properties electrocatalytic performance stability system or device. The highly performant durable 3D electrocatalysts requires an optimized hierarchical morphology surface structures high activity. A approach determine hierarchically structured accuracy described, based on...
An experimental approach to control the fracture behavior of 3D nanopatterned structures in real time and describe microcrack propagation solids quantitatively is presented. The three-dimensional details complicated failure mechanism are unveiled with high resolution using a method that integrates micro-scale mechanics test into nano X-ray computed tomography system, allow in-situ imaging kinetics damage mechanisms integrated circuits. With unique combination miniaturized micro-mechanical...
Nickel-rich layered oxides, crucial for high-energy-density Li-ion batteries, face challenges in cycle life due to intricate chemo-mechanical degradation. This study pioneers a comprehensive approach, integrating nano X-ray computed tomography and advanced electrochemical methods, untangle the interplay of degradation mechanisms complex composite electrodes. The evolution cracking cathodes is meticulously quantified under diverse operating conditions. Surprisingly, our findings unveil that,...
Laboratory transmission X-ray microscopy with a spatial resolution of about 100 nm was used to image 3D interconnect structures and failures in microchips during mechanical loading, applied by microDouble Cantilever Beam (micro-DCB) test. High-resolution sequences based on nano computed tomography (nano-XCT) are visualize crack opening propagation fully integrated multilevel on-chip circuits. The nondestructive investigation sub-micron cracks the in-situ micro-DCB test allows one identify...
High‐resolution computed X‐ray tomography (XCT) is applied in this study to characterize the microstructure of Molten Carbonate Fuel Cell (MCFC) cathodes after operation, where a “virgin cathode” formed by porous nickel has been situ oxidized and infiltrated liquid electrolyte. This technique extends state‐of‐the art methodology pores such as porosity analysis using Mercury porosimetry. XCT enables 3D imaging internal structure electrodes including all components present at cathode side,...
High-resolution nano X-ray computed tomography (nano-XCT) was used to investigate the process of infiltration a Molten Carbonate Fuel Cell (MCFC) matrix by liquid electrolyte. A ceramic made LiAl 2O3 powder infiltrated electrolyte during start-up MCFC. Nano-XCT extends state-of-the art techniques for characterizing morphology and study penetration kinetics with Quantitative analysis using high-resolution nano-XCT provides 3D information each MCFC component nondestructively. The spatially...