| 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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Ihiawakrim, Dris
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2024Ultrasonic chemical synthesis of zinc-manganese ferrites with improved magnetic properties.citations
- 2024Tailoring the pore structure of iron oxide core@stellate mesoporous silica shell nanocomposites: effects on MRI and magnetic hyperthermia properties and applicability to anti-cancer therapiescitations
- 2022A detailed investigation of the core@shell structure of exchanged coupled magnetic nanoparticles after performing solvent annealingcitations
- 2022TiO2 supported Co catalysts for the hydrogenation of γ-valerolactone to 2methyltetrahydrofuran: influence of the supportcitations
- 2022Shedding light on functional hybrid nanocomposites 19th century paint mediumcitations
- 2021Versatile template-directed synthesis of gold nanocages with a predefined number of windowscitations
- 2020Quantitative Analysis of the Specific Absorption Rate Dependence on the Magnetic Field Strength in ZnxFe3−xO4 Nanoparticlescitations
- 2020Efficiency of pyoverdines in iron removal from flocking asbestos waste: An innovative bacterial bioremediation strategycitations
- 2019Study by advanced transmission electron microscopy techniques fragile materials
- 2019The effect of basic pH on the elaboration of ZnFe2O4 nanoparticles by co-precipitation method: Structural, magnetic and hyperthermia characterizationcitations
- 2019The effect of basic pH on the elaboration of ZnFe2O4 nanoparticles by co-precipitation method: Structural, magnetic and hyperthermia characterizationcitations
- 2018High pressures pathway toward boron-based nanostructured solidscitations
- 2018High pressures pathway toward boron-based nanostructured solidscitations
- 2016Metal nanoparticle mediated space charge and its optical control in an organic hole-only devicecitations
- 2016Surface plasmon resonance of an individual nano-object on an absorbing substrate : quantitative effects of distance and 3D orientationcitations
- 2016Surface plasmon resonance of an individual nano-object on an absorbing substrate : quantitative effects of distance and 3D orientationcitations
- 2016Advanced three dimensional characterization of silica-based ultraporous materialscitations
- 2014Magnetic Properties of Mono- and Multilayer Assemblies of Iron Oxide Nanoparticles Promoted by SAMscitations
- 2013A single-stage functionalization and exfoliation method for the production of graphene in water: stepwise construction of 2D-nanostructured composites with iron oxide nanoparticlescitations
- 2013A single-stage functionalization and exfoliation method for the production of graphene in water: stepwise construction of 2D-nanostructured composites with iron oxide nanoparticlescitations
- 2012Hexahistidine-Tagged Single-Walled Carbon Nanotubes (His6-tagSWNTs): A Multifunctional Hard Template for Hierarchical Directed Self-Assembly and Nanocomposite Constructioncitations
Places of action
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article
A detailed investigation of the core@shell structure of exchanged coupled magnetic nanoparticles after performing solvent annealing
Abstract
Thanks to important advances in synthesis techniques, a wide collection of bimagnetic core-shell nanoparticles with tunable properties was reported in the literature. Such nanoparticles may combine two phases with different intrinsic magnetic properties (magnetization, anisotropy, coercive field, etc.). Core-shell structures with large interfaces usually favor efficient exchange coupling between both phases that may result in the enhancement of the effective magnetic anisotropy energy and of the coercive field. In this context, the chemical composition and the crystal structure of the core/shell interface in nanoparticles are crucial parameters to modulate efficiently their magnetic properties. Here, we report on the solvent mediated thermal annealing of Fe 3Àd O 4 @CoO nanoparticles in a high boiling point solvent. The structure of nanoparticles was investigated before and after thermal annealing by advanced characterization techniques such as high resolution transmission electron microscopy (HR-TEM), X-ray absorption spectroscopy (XAS), X-ray magnetic circular dichroism (XMCD) and diffraction anomalous near edge structure (DANES). The combination of DANES and XAS/XMCD allowed studying the cationic distribution in spinel and wu ¨stite crystal structures as a function of site occupancy and oxidation state. To the best of our knowledge, it is the first time that DANES is performed to quantitatively investigate the chemical composition of biphasic metal oxide nanoparticles. Hence, we have investigated precisely the chemical composition of the spinel phase and that of the wu ¨stite phase. Besides the partial solubilisation of the CoO shell observed by HR-TEM, thermal annealing favors the formation of a thicker intermediate Co-doped ferrite layer at the spinel/wu ¨stite interface. Such significant modifications of the core@shell structure markedly influence interfacial coupling phenomena between the core and the shell, hence offering wide perspectives towards nanoparticles with tunable magnetic properties for a variety of applications.