| 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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Wang, Dong
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (17/17 displayed)
- 2024Engineered Anchor Peptide LCI with a Cobalt Cofactor Enhances Oxidation Efficiency of Polystyrene Microparticlescitations
- 2024Hydrogen diffusivity in X65 pipeline steel: Desorption and permeation studiescitations
- 2024Low-temperature process design for inversion mode n-channel thin-film-transistor on polycrystalline Ge formed by solid-phase crystallizationcitations
- 2024Controllable Si oxidation mediated by annealing temperature and atmosphere
- 2024Safe pipelines for hydrogen transportcitations
- 2024Integration of Multijunction Absorbers and Catalysts for Efficient Solar‐Driven Artificial Leaf Structures: A Physical and Materials Science Perspectivecitations
- 2023Gold nanosponges: fascinating optical properties of a unique disorder-dominated systemcitations
- 2022A dual functional chondro-inductive chitosan thermogel with high shear modulus and sustained drug release for cartilage tissue engineeringcitations
- 2022Controllable Si oxidation mediated by annealing temperature and atmospherecitations
- 2022Thin film nanostructuring at oblique angles by substrate patterning
- 2021Rapid fabrication and interface structure of highly faceted epitaxial Ni-Au solid solution nanoparticles on sapphirecitations
- 2019Investigation of a surface mounted pm machine concept with 3d-flux paths, modular stator and amorphous materialcitations
- 2018The effect of in-situ hydrogen plasma charging on the hydrogen embrittlement susceptibility of DP and TRIP steel
- 2016Solid-state dewetting of single- and bilayer Au-W thin films: unraveling the role of individual layer thickness, stacking sequence and oxidation on morphology evolutioncitations
- 2014A highly active and magnetically recoverable tris(triazolyl)-CuI catalyst for alkyne-azide cycloaddition reactionscitations
- 2013Nuclear resonance vibrational spectroscopic and computational study of high-valent diiron complexes relevant to enzyme intermediates.citations
- 2005Polymerization and carbonization of high internal phase emulsionscitations
Places of action
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article
Rapid fabrication and interface structure of highly faceted epitaxial Ni-Au solid solution nanoparticles on sapphire
Abstract
Supersaturated Ni-Au solid solution particles were synthesized by rapid solid-state dewetting of bilayer thin films deposited onto c-plane sapphire single-crystals. Rapid thermal annealing above the miscibility gap of the Ni-Au system followed by quenching to room temperature resulted in textured and faceted submicron-sized particles as a function of alloying content in the range of 0-28 at% Au. Morphologically, the observed kinetic crystal shapes are confined by close-packed planes; in addition, high-index facets are identified as a function of alloying content by TEM cross-sectioning and equilibrium crystal shape simulations. All samples exhibit a distinct <111> out-of-plane as well as in-plane texture along densely packed directions. Lattice parameters extracted from independent orthogonal X-ray and electron diffraction techniques prove the formation of a solid solution without tetragonal distortion imposed by the sapphire substrate. At the particle-substrate interface of highly alloyed particles segregation of Au atoms as well as dislocations in stand-off position are found. These observations are in-line with a semi-coherent interface, where Au segregation is triggered by the reduction of the overall strain energy due to: (i) a lower shear modulus on the particle side of the interface, (ii) the shifting of misfit dislocations in stand-off position further away from the stiffer substrate and (iii) a reduction of intrinsic misfit dislocation strain energy on the tensile side. In addition, the mechanical properties of pure and alloyed particles were characterized by in situ compression experiments in the SEM. Typical force-displacement data of defect-free single-crystals were obtained, reaching the theoretical strength of Ni for particles smaller than 400 nm. Alloying changes the mechanical response from an intermittent and discrete plastic flow behavior into a homogeneous deformation regime at large compressive strain.