| 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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Calame, Michel
University of Basel
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2024AFM-IR of electrohydrodynamically printed PbS quantum dots: quantifying ligand exchange at the nanoscalecitations
- 2023On-surface synthesis and characterization of teranthene and hexanthene: ultrashort graphene nanoribbons with mixed armchair and zigzag edgescitations
- 2023Edge contacts to atomically precise graphene nanoribbonscitations
- 2022Conductive hybrid Cu-HHTP-TCNQ metal–organic frameworks for chemiresistive sensingcitations
- 2022Sensing of KCl, NaCl, and pyocyanin with a MOF-decorated electrospun nitrocellulose matrixcitations
- 2021Combining polarized Raman spectroscopy and micropillar compression to study microscale structure-property relationships in mineralized tissuescitations
- 2020Massive dirac fermion behavior in a low bandgap graphene nanoribbon near a topological phase boundarycitations
- 2020Massive Dirac Fermion Behavior in a Low Bandgap Graphene Nanoribbon Near a Topological Phase Boundary.citations
- 2020Release of graphene-related materials from epoxy-based composites: characterization, quantification and hazard assessment in vitrocitations
- 2017Multiple physical timescales and dead time rule in few-nm sized graphene-SiOx-graphene memristorscitations
- 2015Interplay between Mechanical and Electronic Degrees of Freedom in pi-Stacked Molecular Junctions: From Single Molecules to Mesoscopic Nanoparticle Networkscitations
- 2015Ordered nanoparticle arrays interconnected by molecular linkerscitations
Places of action
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article
Combining polarized Raman spectroscopy and micropillar compression to study microscale structure-property relationships in mineralized tissues
Abstract
Bone is a natural composite possessing outstanding mechanical properties combined with a lightweight design. The key feature contributing to this unusual combination of properties is the bone hierarchical organization ranging from the nano- to the macro-scale. Bone anisotropic mechanical properties from two orthogonal planes (along and perpendicular to the main bone axis) have already been widely studied. In this work, we demonstrate the dependence of the microscale compressive mechanical properties on the angle between loading direction and the mineralized collagen fibril orientation in the range between 0° and 82°. For this, we calibrated polarized Raman spectroscopy for quantitative collagen fibril orientation determination and validated the method using widely used techniques (small angle X-ray scattering, micro-computed tomography). We then performed compression tests on bovine cortical bone micropillars with known mineralized collagen fibril angles. A strong dependence of the compressive micromechanical properties of bone on the fibril orientation was found with a high degree of anisotropy for both the elastic modulus ( E a / E t = 3.80) and the yield stress ( σ a y / σ t y = 2.54). Moreover, the post-yield behavior was found to depend on the MCF orientation with a transition between softening to hardening behavior at approximately 50°. The combination of methods described in this work allows to reliably determine structure-property relationships of bone at the microscale, which may be used as a measure of bone quality.