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8 results on '"Marbaix, J."'

2. Internal Temperature Measurements by X-Ray Diffraction on Magnetic Nanoparticles Heated by a High-Frequency Magnetic Field

Author

Faure, Stéphane, Mille, N, Kale, S, Asensio, J.-M, Marbaix, J, Farger, P, Stoian², D, Van Beek², W, Fazzini, Pier-Francesco, Soulantika, Aikaterini, Chaudret, Bruno, Carrey, Julian, Laboratoire de physique et chimie des nano-objets (LPCNO), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Nanomagnétisme (LPCNO), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie de Toulouse (ICT-FR 2599), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC), and Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC)

Subjects
[PHYS]Physics [physics], magnetic nanoparticles, X-rays diffraction, Local temperature, Quantitative Biology::Cell Behavior, Inductive heating, Synthetic natural gas
Abstract

International audience; There is a theoretical and experimental controversy on the possibility for magnetic nanoparticles (MNPs) heated by high-frequency magnetic fields to reach a temperature much larger than the one of their environments. Here the internal temperature of magnetically heated magnetite MNPs is measured using the temperature dependence of their lattice parameter , and compared to the one of their environments, measured from reference non-magnetic particles. Within the uncertainty of our experimental methods, which is estimated to be below 5°C, the MNP temperature is the same as the one of their environments.

Published
2020
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3. Ultrastable Magnetic Nanoparticles Encapsulated in Carbon for Magnetically Induced Catalysis.

Author

Martínez-Prieto LM, Marbaix J, Asensio JM, Cerezo-Navarrete C, Fazzini PF, Soulantica K, Chaudret B, and Corma A

Abstract

Magnetically 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. Here we present encapsulated magnetic FeCo and Co NPs in carbon ( Co@C and FeCo@C ) as an ultrastable heating material suitable for high-temperature magnetic catalysis. Indeed, FeCo@C or a mixture of FeCo@C:Co@C (2:1) decorated with Ni or Pt-Sn showed good stability in terms of temperature and catalytic performances. In addition, consistent conversions and selectivities regarding conventional heating were observed for CO 2 methanation (Sabatier reaction), propane dehydrogenation (PDH), and propane dry reforming (PDR). Thus, the encapsulation of MagNPs in carbon constitutes a major advance in the development of stable catalysts for high-temperature magnetically induced catalysis., Competing Interests: The authors declare no competing financial interest., (Copyright © 2020 American Chemical Society.)

Published
2020
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4. To heat or not to heat: a study of the performances of iron carbide nanoparticles in magnetic heating.

Author

Asensio JM, Marbaix J, Mille N, Lacroix LM, Soulantica K, Fazzini PF, Carrey J, and Chaudret B

Abstract

Heating magnetic nanoparticles with high frequency magnetic fields is a topic of interest for biological applications (magnetic hyperthermia) as well as for heterogeneous catalysis. This study shows why FeC NPs of similar structures and static magnetic properties display radically different heating power (SAR from 0 to 2 kW g-1). By combining results from Transmission Electron Microscopy (TEM), Dynamic Light Scattering (DLS) and static and time-dependent high-frequency magnetic measurements, we propose a model describing the heating mechanism in FeC nanoparticles. Using, for the first time, time-dependent high-frequency hysteresis loop measurements, it is shown that in the samples displaying the larger heating powers, the hysteresis is strongly time dependent. More precisely, the hysteresis area increases by a factor 10 on a timescale of a few tens of seconds. This effect is directly related to the ability of the nanoparticles to form chains under magnetic excitation, which depends on the presence or not of strong dipolar couplings. These differences are due to different ligand concentrations on the surface of the particles. As a result, this study allows the design of a scalable synthesis of nanomaterials displaying a controllable and reproducible SAR.

Published
2019
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5. Application of new nanoparticle structures as catalysts: general discussion.

Author

Baletto F, Boeije M, Bordet A, Brinkert K, Catlow R, Davies J, Dononelli W, Freund HJ, Friend C, Gates B, Genest A, Guan S, Hardacre C, Hargreaves J, Huang H, Hutchings G, Johnston R, Lai S, Lamberti C, Marbaix J, Miranda CR, Nome R, Peron J, Quinson J, Richards N, Roesch N, Russell A, Said S, Selvam P, Sermon P, Shozi M, Skylaris CK, Spolaore F, Walker J, Whiston K, and Willock D

Published
2018
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6. Theory as a driving force to understand reactions on nanoparticles: general discussion.

Author

Arrigo R, Badmus K, Baletto F, Boeije M, Brinkert K, Bugaev A, Bukhtiyarov V, Carosso M, Catlow R, Chutia A, Davies P, de Leeuw N, Dononelli W, Freund HJ, Friend C, Gates B, Genest A, Hargreaves J, Hutchings G, Johnston R, Lamberti C, Marbaix J, Miranda CR, Odarchenko Y, Richards N, Russell A, Selvam P, Sermon P, Shah P, Shevlin S, Shozi M, Skylaris CK, Soulantica K, Torrente-Murciano L, Trunschke A, van Santen R, Verga LG, Whiston K, and Willock D

Published
2018
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7. [Collective emergency service].

Author

Marbaix JP, Monfroy-Moity V, and Belotte F

Subjects
Humans, Emergency Medical Services, Emergency Service, Hospital
Published
1995

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