| 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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Tremel, W.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2021Understanding the Stability and Recrystallization Behavior of Amorphous Zinc Phosphatecitations
- 2021A Generalized Method for High-Speed Fluorination of Metal Oxides by Spark Plasma Sintering Yields Ta3O7F and TaO2F with High Photocatalytic Activity for Oxygen Evolution from Watercitations
- 2020Monitoring a Mechanochemical Syntheses of Isostructural Luminescent Cocrystals of 9-Anthracenecarboxylic Acid with two Dipyridines Coformerscitations
- 2020Insights into the In Vitro Formation of Apatite from Mg‐Stabilized Amorphous Calcium Carbonatecitations
- 2018Iron Oxide Superparticles with Enhanced MRI Performance by Solution Phase Epitaxial Growthcitations
- 2018Controlling the Morphology of Au-Pd Heterodimer Nanoparticles by Surface Ligandscitations
- 2018From Single Molecules to Nanostructured Functional Materialscitations
- 2018The surface chemistry of iron oxide nanocrystalscitations
- 2017Polypropylene-based melt mixed composites with singlewalled carbon nanotubes for thermoelectric applications: Switching from p-type to n-type by the addition of polyethylene glycolcitations
- 2014Rational assembly and dual functionalization of Au@MnO heteroparticles on TiO2 nanowirescitations
- 2014Nanometallic silver inks for metallization of ITO-coated silicon solar cells. Influence of organic components
- 2012Vanadium pentoxide nanoparticles mimic vanadium haloperoxidases and thwart biofilm formationcitations
- 2011Asymmetric tungsten oxide nanobrushes via oriented attachment and Ostwald ripeningcitations
- 2010Solution Synthesis of a New Thermoelectric Zn1-xSb Nanophase and Its Structure Determination Using Automated Electron Diffraction Tomographycitations
- 2009Synthesis of Fullerene- and Nanotube-Like SnS2 Nanoparticles and Sn/S/Carbon Nanocompositescitations
Places of action
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article
The surface chemistry of iron oxide nanocrystals
Abstract
<p>The effect of surface functionalization on the structural and magnetic properties of catechol-functionalized iron oxide magnetic (γ-Fe<sub>2</sub>O<sub>3</sub>) nanocrystals was investigated. γ-Fe<sub>2</sub>O<sub>3</sub> nanocrystals (NCs) were synthesized from iron acetyl acetonate in phenyl ether with 1,2-tetradecanediol, oleic acid, and oleylamine. X-ray powder diffraction in combination with Mössbauer spectroscopy revealed the presence of γ-Fe<sub>2</sub>O<sub>3</sub> (maghemite) particles only. Replacement of oleic acid (OA) with catechol-type 3,4-dihydroxyhydrocinnamic acid (DHCA) or polydentate polydopamine acrylate (PDAm) surface ligands leads to a pronounced change of the magnetic behavior of the γ-Fe<sub>2</sub>O<sub>3</sub> nanocrystals and separated them into two distinctive magnetic entities. XPS and Mössbauer spectroscopy revealed the shell to be reduced with a magnetite (Fe<sub>3</sub>O<sub>4</sub>) contribution of up to 33% of the total mass while the core remained maghemite (γ-Fe<sub>2</sub>O<sub>3</sub>). The magnetic interaction between the maghemite core and the magnetite shell strongly reduced the anisotropy constant of the nanocrystals and the effective magnetization. Our experiments show that the surface chemistry strongly affects the phase distribution and the macroscopic magnetic properties of iron oxide nanopowders.</p>