| 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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Sztucki, Michael
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2022Controlling the rotation modes of hematite nanospindles using dynamic magnetic fields
- 2021Direct Structural Evidence for Interfacial Gradients in Asymmetric Polymer Nanocomposite Blendscitations
- 2020Packing polydisperse colloids into crystals: when charge-dispersity matterscitations
- 2020Partition of coating agents between nanoparticle interfaces and the polymer in manocompositescitations
- 2020Partition of Coating Agents between Nanoparticle Interfaces and the Polymer in Nanocompositescitations
- 2019Packing polydisperse colloids into crystals: when charge-dispersity matters
- 2019Compressive behaviour of uniaxially aligned individual mineralised collagen fibres at the micro- and nanoscalecitations
- 2019The payne effect: primarily polymer-related or filler-related phenomenon?citations
- 2019Strained Bottlebrushes in Super-Soft Physical Networkscitations
- 2018Mechanistic Insights into Polyion Complex Associationscitations
- 2016Structure of alumina-silica nanoparticles grafted with alkylphosphonic acids in poly(ethylacrylate) nanocompositescitations
- 2016Structure of alumina-silica nanoparticles grafted with alkylphosphonic acids in poly(ethylacrylate) nanocompositescitations
- 2015Surface modification of alumina-coated silica nanoparticles in aqueous sols with phosphonic acids and impact on nanoparticle interactionscitations
- 2015Surface modification of alumina-coated silica nanoparticles in aqueous sols with phosphonic acids and impact on nanoparticle interactions.citations
- 2015Origin of Small-Angle Scattering from Contrast-Matched Nanoparticles: A Study of Chain and Filler Structure in Polymer Nanocompositescitations
- 2014Tuning Structure and Rheology of Silica–Latex Nanocomposites with the Molecular Weight of Matrix Chains: A Coupled SAXS–TEM–Simulation Approachcitations
- 2013Dynamics of incipient carbon particle formation in a stabilized ethylene flame by in situ extended-small-angle- and wide-angle X-ray scatteringcitations
- 2013Dynamics of incipient carbon particle formation in a stabilized ethylene flame by in situ extended-small-angle- and wide-angle X-ray scattering.citations
- 2012Structure-property relationships of a biological mesocrystal in the adult sea urchin spinecitations
- 2012Structure-property relationships of a biological mesocrystal in the adult sea urchin spinecitations
- 2006Kinetic arrest and glass-glass transition in short-ranged attractive colloids
Places of action
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article
Compressive behaviour of uniaxially aligned individual mineralised collagen fibres at the micro- and nanoscale
Abstract
The increasing incidence of osteoporotic bone fractures makes fracture risk prediction an important clinical challenge. Computational models can be utilised to facilitate such analyses. However, they critically depend on bone’s underlying hierarchical material description. To understand bone’s irreversible behaviour at the micro- and nanoscale, we developed an in situ testing protocol that allows us to directly relate the experimental data to the mechanical behaviour of individual mineralised collagen fibres and its main constitutive phases, the mineralised collagen fibrils and the mineral nanocrystals, by combining micropillar compression of single fibres with small angle X-ray scattering (SAXS) and X-ray diffraction (XRD). Failure modes were assessed by SEM. Strain ratios in the elastic region at fibre, fibril and mineral levels were found to be approximately 22:5:2 with strain ratios at the point of compressive strength of 0.23 0.11 for fibril-to-fibre and 0.07 0.01 for mineral-to-fibre levels. Mineral-to-fibre levels showed highest strain ratios around the apparent yield point, fibril-to-fibre around apparent strength. The mineralised collagen fibrils showed a delayed mechanical response, contrary to the mineral phase, which points towards preceding deformations of mineral nanocrystals in the extrafibrillar matrix. No damage was measured at the level of the mineralised collagen fibre which indicates an incomplete separation of the mineral and collagen, and an extrafibrillar interface failure. The formation of kink bands and the gradual recruitment of fibrils upon compressive loading presumably led to localised strains. Our results from a well-controlled fibrillar architecture provide valuable input for micromechanical models and computational non-linear bone strength analyses that may provide further insights for personalised diagnosis and treatment as well as bio-inspired implants for patients with bone diseases.