Characterization of carbon-coated core-shell iron nanoparticles annealed by oxygen and nitrogen
Nanocomposites consisting of nanoparticles of iron oxide (Fe3O4) and iron carbide (Fe3C) with a core-shell structure (Fe core, Fe3O4 and/or Fe3C shells) coated with additional graphite-like carbon layer dispersed in carbon matrix have been synthesized by solid-phase pyrolysis of iron-phthalocyanine...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2024-02-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/9.0000845 |
| _version_ | 1797278299746992128 |
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| author | Franco Iglesias Cristian Reynaga Gonzalez Jonah Baughman Nichole Wonderling Jeffrey Shallenberger Armond Khodagulyan Oscar O. Bernal Armen N. Kocharian |
| author_facet | Franco Iglesias Cristian Reynaga Gonzalez Jonah Baughman Nichole Wonderling Jeffrey Shallenberger Armond Khodagulyan Oscar O. Bernal Armen N. Kocharian |
| author_sort | Franco Iglesias |
| collection | DOAJ |
| description | Nanocomposites consisting of nanoparticles of iron oxide (Fe3O4) and iron carbide (Fe3C) with a core-shell structure (Fe core, Fe3O4 and/or Fe3C shells) coated with additional graphite-like carbon layer dispersed in carbon matrix have been synthesized by solid-phase pyrolysis of iron-phthalocyanine (FePc) and iron-porphyrin (FePr) with a pyrolysis temperature of 900°C, and post-annealing conducted at temperatures ranging from 150°C to 550°C under controlled oxygen- and/or nitrogen-rich environments. A comprehensive analysis of the samples’ morphology, composition, structure, size, and magnetic characteristics was performed by utilizing scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-STEM) with elemental mapping, X-ray diffraction analysis (XRD), and magnetic measurements by utilizing vibrating sample magnetometry (VSM). The effect of the annealing process on magnetic performance and efficient control of the hysteresis loop and specific absorption rate (SAR) are discussed. |
| first_indexed | 2024-03-07T16:01:20Z |
| format | Article |
| id | doaj.art-aae4138d06e84c568c2094a8f52f87d7 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-03-07T16:01:20Z |
| publishDate | 2024-02-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-aae4138d06e84c568c2094a8f52f87d72024-03-04T21:29:32ZengAIP Publishing LLCAIP Advances2158-32262024-02-01142025040025040-610.1063/9.0000845Characterization of carbon-coated core-shell iron nanoparticles annealed by oxygen and nitrogenFranco Iglesias0Cristian Reynaga Gonzalez1Jonah Baughman2Nichole Wonderling3Jeffrey Shallenberger4Armond Khodagulyan5Oscar O. Bernal6Armen N. Kocharian7Department of Physics and Astronomy, California State University, Los Angeles, California 90032, USADepartment of Physics and Astronomy, California State University, Los Angeles, California 90032, USADepartment of Physics and Astronomy, California State University, Los Angeles, California 90032, USAMaterial Research Institute, Pennsylvania State University, Pollock Road, University Park, Pennsylvania 16802, USAMaterial Research Institute, Pennsylvania State University, Pollock Road, University Park, Pennsylvania 16802, USADepartment of Physics and Astronomy, California State University, Los Angeles, California 90032, USADepartment of Physics and Astronomy, California State University, Los Angeles, California 90032, USADepartment of Physics and Astronomy, California State University, Los Angeles, California 90032, USANanocomposites consisting of nanoparticles of iron oxide (Fe3O4) and iron carbide (Fe3C) with a core-shell structure (Fe core, Fe3O4 and/or Fe3C shells) coated with additional graphite-like carbon layer dispersed in carbon matrix have been synthesized by solid-phase pyrolysis of iron-phthalocyanine (FePc) and iron-porphyrin (FePr) with a pyrolysis temperature of 900°C, and post-annealing conducted at temperatures ranging from 150°C to 550°C under controlled oxygen- and/or nitrogen-rich environments. A comprehensive analysis of the samples’ morphology, composition, structure, size, and magnetic characteristics was performed by utilizing scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-STEM) with elemental mapping, X-ray diffraction analysis (XRD), and magnetic measurements by utilizing vibrating sample magnetometry (VSM). The effect of the annealing process on magnetic performance and efficient control of the hysteresis loop and specific absorption rate (SAR) are discussed.http://dx.doi.org/10.1063/9.0000845 |
| spellingShingle | Franco Iglesias Cristian Reynaga Gonzalez Jonah Baughman Nichole Wonderling Jeffrey Shallenberger Armond Khodagulyan Oscar O. Bernal Armen N. Kocharian Characterization of carbon-coated core-shell iron nanoparticles annealed by oxygen and nitrogen AIP Advances |
| title | Characterization of carbon-coated core-shell iron nanoparticles annealed by oxygen and nitrogen |
| title_full | Characterization of carbon-coated core-shell iron nanoparticles annealed by oxygen and nitrogen |
| title_fullStr | Characterization of carbon-coated core-shell iron nanoparticles annealed by oxygen and nitrogen |
| title_full_unstemmed | Characterization of carbon-coated core-shell iron nanoparticles annealed by oxygen and nitrogen |
| title_short | Characterization of carbon-coated core-shell iron nanoparticles annealed by oxygen and nitrogen |
| title_sort | characterization of carbon coated core shell iron nanoparticles annealed by oxygen and nitrogen |
| url | http://dx.doi.org/10.1063/9.0000845 |
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