Structure and Magnetism of Fe/Fe<sub>3</sub>C Nanoparticles in Carbon Spheres

ORAL

Abstract

Iron-cementite (Fe/Fe3C) nanoparticles in carbon spheres were synthesized by a solid-phase pyrolysis of iron phthalocyanine. The morphology, sizes and composition of the synthesized nanocomposite were studied by high-resolution transmission and scanning transmission electron microscopes (HRTEM, STEM), Mossbauer spectroscopy, X-ray diffraction and extended X-ray absorption fine structure (EXAFS). The M-T dependence shows a significant increase of magnetization at temperatures slightly below 10 K. Apparently, such behavior at low temperatures can be associated with the magnetic properties of the carbon matrix. The heating efficiency of samples under study was evaluated by forming aqueous solutions of 10 mg/mL and exposing them in AC magnetic field 375 kHz/60 mT. Fe-content is a determinant of heating efficiency quantification as expressed by the Specific Loss Power Index. Thus, we surmise that with facile synthetic steps, currently underway, SLP value may enhance even further and render such nanoparticles biomedically exploitable.

*This work was supported by the EC project H2020-EU.4.b. - Twinning of research institutions No. 857502 (MaNaCa). The work at CSULA was supported by CREST Grant # HRD-1547723

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Presenters

  • Armen Kocharian

    • California State University, Los Angeles

Authors

  • Harutyun Gyulasaryan

    • Russian-Armenian (Slavonic) University
    • Sold State Lab, Institute for Physical Research of National Academy of Sciences (IPR-NAS)

  • Elisavet Papadopoulou

    • Faculty of Physics and Center of Nanointegration (CENIDE), University of Duisburg-Essen

  • Nikolaos Tetos

    • Faculty of Physics and Center of Nanointegration (CENIDE), University of Duisburg-Essen

  • Gayane Chilingaryan

    • Sold State Lab, Institute for Physical Research of National Academy of Sciences (IPR-NAS)

  • Marina Spasova

    • Faculty of Physics and Center of Nanointegration (CENIDE), University of Duisburg-Essen

  • Michael Farle

    • Faculty of Physics and Center of Nanointegration (CENIDE), University of Duisburg-Essen

  • Aram Manukyan

    • Russian-Armenian (Slavonic) University
    • Sold State Lab, Institute for Physical Research of National Academy of Sciences (IPR-NAS)

  • Eirini Myrovali

    • MagnaCharta, Center of Interdisciplinary Research and Innovation, Aristotle University of Thessaloniki

  • Makis Angelakeris

    • MagnaCharta, Center of Interdisciplinary Research and Innovation, Aristotle University of Thessaloniki

  • Kevin Castillo

    • California State University, Los Angeles

  • Oscar Bernal

    • California State University, Los Angeles

  • Armen Kocharian

    • California State University, Los Angeles