| 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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Dupraz, Maxime
Institut Néel
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2021Twin boundary migration in an individual platinum nanocrystal during catalytic CO oxidationcitations
- 2021Deciphering the interactions between single arm dislocation sources and coherent twin boundary in nickel bi-crystalcitations
- 2021A convolutional neural network for defect classification in Bragg coherent X-ray diffractioncitations
- 2020Mapping Inversion Domain Boundaries along Single GaN Wires with Bragg Coherent X-ray Imagingcitations
- 2020Mapping inversion domain boundaries along single GaN wires with Bragg coherent X-ray imagingcitations
- 2020Mapping inversion domain boundaries along single GaN wires with Bragg coherent X-ray imagingcitations
- 2020Bragg Coherent Imaging of nanoprecipitates: role of superstructure reflections ; Imagerie par diffraction des rayons X cohérents de nanoprécipités: rôle des réflexions de surstructure
- 2020Bragg coherent imaging of nanoprecipitates: role of superstructure reflectionscitations
- 2019Enhanced precipitate growth at reduced temperatures during chemical ordering in deformed red gold alloyscitations
- 20173D imaging of a dislocation loop at the onset of plasticity in an indented nanocrystalcitations
- 20173D imaging of a dislocation loop at the onset of plasticity in an indented nanocrystalcitations
- 2015Signature of dislocations and stacking faults of face-centred cubic nanocrystals in coherent X-ray diffraction patterns: a numerical studycitations
Places of action
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article
3D imaging of a dislocation loop at the onset of plasticity in an indented nanocrystal
Abstract
Structural quality and stability of nanocrystals are fundamental problems that bear important consequences for the performances of small-scale devices. Indeed, at the nanoscale, their functional properties are largely influenced by elastic strain and depend critically on the presence of crystal defects. It is thus of prime importance to be able to monitor, by noninvasive means, the stability of the microstructure of nano-objects against external stimuli such as mechanical load. Here we demonstrate the potential of Bragg coherent diffraction imaging for such measurements, by imaging in 3D the evolution of the microstructure of a nanocrystal exposed to in situ mechanical loading. Not only could we observe the evolution of the internal strain field after successive loadings, but we also evidenced a transient microstructure hosting a stable dislocation loop. The latter is fully characterized from its characteristic displacement field. The mechanical behavior of this small crystal is clearly at odds with what happens in bulk materials where many dislocations interact. Moreover, this original in situ experiment opens interesting possibilities for the investigation of plastic deformation at the nanoscale.