Publications by authors named "J Marbaix"
Magnetic heating, namely, the use of heat released by magnetic nanoparticles (MNPs) excited with a high-frequency magnetic field, has so far been mainly used for biological applications. More recently, it has been shown that this heat can be used to catalyze chemical reactions, some of them occurring at temperatures up to 700 °C. The full exploitation of MNP heating properties requires the knowledge of the temperature dependence of their heating power up to high temperatures.
View Article and Find Full Text PDFMagnetically induced catalysis using magnetic nanoparticles (MagNPs) as heating agents is a new efficient method to perform reactions at high temperatures. However, the main limitation is the lack of stability of the catalysts operating in such harsh conditions. Normally, above 500 °C, significant sintering of MagNPs takes place.
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- - This study investigates how heating efficiency varies among FeC nanoparticles (NPs) with similar structures, revealing that their specific absorption rate (SAR) can differ significantly, ranging from 0 to 2 kW g-1.
- - Using advanced techniques like Transmission Electron Microscopy (TEM) and time-dependent high-frequency magnetic measurements, the researchers propose a model explaining why some nanoparticles heat more effectively by forming chains under magnetic fields due to their dipolar couplings.
- - The findings link the heating power variations to different ligand concentrations on the NPs' surfaces, paving the way for a scalable synthesis of customizable nanomaterials with predictable heating properties.