| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Schwaiger, Ruth
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (25/25 displayed)
- 2024Enabling High-Performance Hybrid Solid-State Batteries by Improving the Microstructure of Free-Standing LATP/LFP Composite Cathodes
- 2024Controlling shear band instability by nanoscale heterogeneities in metallic nanoglasses
- 2024Microstructure Characterization and Mechanical Properties of Polymer‐Derived (HfₓTa₁₋ₓ)C/SiC Ceramic Prepared upon Field‐Assisted Sintering Technique/Spark Plasma Sintering
- 2024Enabling High-Performance Hybrid Solid-State Batteries by Improving the Microstructure of Free-Standing LATP/LFP Composite Cathodes.citations
- 2024Comparative Study of High-Cycle Fatigue and Failure Mechanisms in Ultrahigh-Strength CrNiMoWMnV Low-Alloy Steels
- 2024Microstructure Characterization and Mechanical Properties of Polymer‐Derived (Hf<sub><i>x</i></sub>Ta<sub>1−<i>x</i></sub>)C/SiC Ceramic Prepared upon Field‐Assisted Sintering Technique/Spark Plasma Sinteringcitations
- 2024Dealing with Missing Angular Sections in NanoCT Reconstructions of Low Contrast Polymeric Samples Employing a Mechanical In Situ Loading Stage
- 2024The effect of grain boundaries and precipitates on the mechanical behavior of the refractory compositionally complex alloy NbMoCrTiAlcitations
- 2023Dealing with missing angular sections in nanoCT reconstructions of low contrast polymeric samples employing a mechanical in situ loading stage
- 20233D‐Printed Inherently Porous Structures with Tetrahedral Lattice Architecture: Experimental and Computational Study of Their Mechanical Behavior
- 2022Lab-based in situ nanoCT as a tool for the 3D structural and mechanical characterization of metamaterials
- 2021Architectural tunability of mechanical metamaterials in the nanometer rangecitations
- 2021Controlling shear band instability by nanoscale heterogeneities in metallic nanoglassescitations
- 2021Optimization of sintering conditions for improved microstructural and mechanical properties of dense Ce0.8Gd0.2O2-δ-FeCo2O4 oxygen transport membranescitations
- 2020Dislocation structures and the role of grain boundaries in cyclically deformed Ni micropillarscitations
- 2020Nanoscale patterning at the Si/SiO<sub>2</sub>/graphene interface by focused He<sup>+</sup> beamcitations
- 2019Size Effect on the Strength and Deformation Behavior of Glassy Carbon Nanopillars
- 2019Sliding wear behavior of fully nanotwinned Cu alloys
- 2018Micromechanics-based investigation of the elastic properties of polymer-modified cementitious materials using nanoindentation and semi-analytical modelingcitations
- 2017Annealing-induced recovery of indents in thin Au(Fe) bilayer films
- 2017Micromechanical study on the deformation behavior of directionally solidified NiAl–Cr eutectic compositescitations
- 2017Micromechanics-based prediction of the elastic properties of polymer-modified cementitious materials
- 2016Hydration of magnesia cubes: a helium ion microscopy study
- 2016Deformation mechanisms and morphology of metallic multilayers revealed by nanosliding and nanoindentation
- 2006Size effects on deformation and fracture of nanostructured metalscitations
Places of action
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article
Nanoscale patterning at the Si/SiO<sub>2</sub>/graphene interface by focused He<sup>+</sup> beam
Abstract
<jats:title>Abstract</jats:title><jats:p>We have studied the capability of He<jats:sup>+</jats:sup> focused ion beam (He<jats:sup>+</jats:sup>-FIB) patterning to fabricate defect arrays on the Si/SiO<jats:sub>2</jats:sub>/Graphene interface using a combination of atomic force microscopy (AFM) and Raman imaging to probe damage zones. In general, an amorphized ‘blister’ region of cylindrical symmetry results upon exposing the surface to the stationary focused He<jats:sup>+</jats:sup> beam. The topography of the amorphized region depends strongly on the ion dose, <jats:italic>D<jats:sub>S</jats:sub></jats:italic>, (ranging from 10<jats:sup>3</jats:sup> to 10<jats:sup>7</jats:sup>ions/spot) with craters and holes observed at higher doses. Furthermore, the surface morphology depends on the distance between adjacent irradiated spots, <jats:italic>L<jats:sub>S</jats:sub></jats:italic>. Increasing the dose leads to (enhanced) subsurface amorphization and a local height increase relative to the unexposed regions. At the highest areal ion dose, the average height of a patterned area also increases as ∼1/<jats:italic>L<jats:sub>S</jats:sub></jats:italic>. Correspondingly, in optical micrographs, the <jats:italic>µ</jats:italic>m<jats:sup>2</jats:sup>-sized patterned surface regions change appearance. These phenomena can be explained by implantation of the He<jats:sup>+</jats:sup> ions into the subsurface layers, formation of helium nanobubbles, expansion and modification of the dielectric constant of the patterned material. The corresponding modifications of the terminating graphene monolayer have been monitored by micro Raman imaging. At low ion doses, <jats:italic>D<jats:sub>S</jats:sub></jats:italic>, the graphene becomes modified by carbon atom defects which perturb the 2D lattice (as indicated by increasing D/G Raman mode ratio). Additional x-ray photoionization spectroscopy (XPS) measurements allow us to infer that for moderate ion doses, scattering of He<jats:sup>+</jats:sup> ions by the subsurface results in the oxidation of the graphene network. For largest doses and smallest <jats:italic>L<jats:sub>S</jats:sub></jats:italic> values, the He<jats:sup>+</jats:sup> beam activates extensive Si/SiO<jats:sub>2</jats:sub>/C bond rearrangement and a multicomponent material possibly comprising SiC and silicon oxycarbides, SiOC, is observed. We also infer parameter ranges for He<jats:sup>+</jats:sup>-FIB patterning defect arrays of potential use for pinning transition metal nanoparticles in model studies of heterogeneous catalysis.</jats:p>