| 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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Vileno, Bertrand
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (5/5 displayed)
- 2024Specific sample configuration for studying photogenerated electron transfer at the semiconductor/water interface by Electron Paramagnetic Resonance
- 2023Model reactions for the evaluation of poly- and multifunctional molecules as potential interfacial agents for the compatibilization of polyethylene/poly(ethylene-<i>co</i>-vinyl alcohol) blendscitations
- 2018Disentangling Magnetic Hardening and Molecular Spin Chain Contributions to Exchange Bias in Ferromagnet/Molecule Bilayerscitations
- 2018Milling effect on the photo-activated properties of ${TiO}_{2}$ nanoparticles: electronic and structural investigationscitations
- 2012Magnetic properties of gold nanoparticles: A room-temperature quantum e ffectcitations
Places of action
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article
Magnetic properties of gold nanoparticles: A room-temperature quantum e ffect
Abstract
International audience ; Gold nanoparticles elicit a huge research activity in view oftheir applications in diagnostics,[1, 2] therapy,[3] drug or gene delivery,[4] sensing[5, 6, 7] and imaging.[8] Gold nanoparticles also displayinteresting catalytic[9, 10] and optical[11, 12, 13, 14] properties.This Communication focuses on the least understood and sofar unused property of gold: its becoming magnetic when preparedin the form of nanoparticles. All these desirable properties,bound together in one nanometric piece of matter, possiblyself-organized thanks to its ligands, make functionalizedgold nanoparticles a treasurable entity for nanosciences. Theex nihilo magnetic properties of functionalized gold (and otherdiamagnetic metals, such a Ag or Cu) nanoparticles, that is,their ferromagnetic-like behavior, are well documented,though still poorly understood.[15] This unexpected propertyopens new perspectives in materials science, in particular forthe design of metamaterials. One may also envisage applicationsin information storage and processing: nanometric magneticparticles with no obvious temperature limitation and possiblyself-organizing are currently much sought-after by thecomputer industry and developing a room-temperature magnetic semiconductor is paramount for the realization of spintronicstechnologies.Herein, we wish to present the results of our own investigationsinto the magnetic properties of functionalized gold nanoparticles.We have made attempts at understanding this magneticbehavior using both traditional techniques (e.g. superconductingquantum interference device, SQUID, magnetometry)and other methods less common in this field, such as zerofield197Au NMR (nuclear magnetic resonance) and SANS (smallangleneutron scattering). We also directly probed the localmagnetic field at the surface of gold nanoparticles using paramagneticTEMPO [(2,2,6,6-tetramethylpiperidin-1-yl)oxyl] radicalsand ESR (electron spin resonance) spectrometry. Surprisingly,none of these experiments provided a clearer picture infine. ...