Novel Magnetic Nanohybrids: From Iron Oxide to Iron Carbide Nanoparticles Grown on Nanodiamonds
The synthesis and characterization of a new line of magnetic hybrid nanostructured materials composed of spinel-type iron oxide to iron carbide nanoparticles grown on nanodiamond nanotemplates is reported in this study. The realization of these nanohybrid structures is achieved through thermal proce...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-12-01
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| Series: | Magnetochemistry |
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| Online Access: | https://www.mdpi.com/2312-7481/6/4/73 |
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| author | Panagiotis Ziogas Athanasios B. Bourlinos Jiri Tucek Ondrej Malina Alexios P. Douvalis |
| author_facet | Panagiotis Ziogas Athanasios B. Bourlinos Jiri Tucek Ondrej Malina Alexios P. Douvalis |
| author_sort | Panagiotis Ziogas |
| collection | DOAJ |
| description | The synthesis and characterization of a new line of magnetic hybrid nanostructured materials composed of spinel-type iron oxide to iron carbide nanoparticles grown on nanodiamond nanotemplates is reported in this study. The realization of these nanohybrid structures is achieved through thermal processing under vacuum at different annealing temperatures of a chemical precursor, in which very fine maghemite (γ-Fe<sub>2</sub>O<sub>3</sub>) nanoparticles seeds were developed on the surface of the nanodiamond nanotemplates. It is seen that low annealing temperatures induce the growth of the maghemite nanoparticle seeds to fine dispersed spinel-type non-stoichiometric ~5 nm magnetite (Fe<sub>3−x</sub>O<sub>4</sub>) nanoparticles, while intermediate annealing temperatures lead to the formation of single phase ~10 nm cementite (Fe<sub>3</sub>C) iron carbide nanoparticles. Higher annealing temperatures produce a mixture of larger Fe<sub>3</sub>C and Fe<sub>5</sub>C<sub>2</sub> iron carbides, triggering simultaneously the growth of large-sized carbon nanotubes partially filled with these carbides. The magnetic features of the synthesized hybrid nanomaterials reveal the properties of their bearing magnetic phases, which span from superparamagnetic to soft and hard ferromagnetic and reflect the intrinsic magnetic properties of the containing phases, as well as their size and interconnection, dictated by the morphology and nature of the nanodiamond nanotemplates. These nanohybrids are proposed as potential candidates for important technological applications in nano-biomedicine and catalysis, while their synthetic route could be further tuned for development of new magnetic nanohybrid materials. |
| first_indexed | 2024-03-10T13:52:03Z |
| format | Article |
| id | doaj.art-2bd12d94b1034c67b363177f115e66a8 |
| institution | Directory Open Access Journal |
| issn | 2312-7481 |
| language | English |
| last_indexed | 2024-03-10T13:52:03Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Magnetochemistry |
| spelling | doaj.art-2bd12d94b1034c67b363177f115e66a82023-11-21T01:58:26ZengMDPI AGMagnetochemistry2312-74812020-12-01647310.3390/magnetochemistry6040073Novel Magnetic Nanohybrids: From Iron Oxide to Iron Carbide Nanoparticles Grown on NanodiamondsPanagiotis Ziogas0Athanasios B. Bourlinos1Jiri Tucek2Ondrej Malina3Alexios P. Douvalis4Physics Department, University of Ioannina, 45110 Ioannina, GreecePhysics Department, University of Ioannina, 45110 Ioannina, GreeceDepartment of Mathematics and Physics, Faculty of Electrical Engineering and Informatics, University of Pardubice, Náměstí Čs. legií 565, 530 02 Pardubice, Czech RepublicRegional Centre of Advanced Technologies and Materials, Palacky University Olomouc, 17. Listopadu 1192/12, 771 46 Olomouc, Czech RepublicPhysics Department, University of Ioannina, 45110 Ioannina, GreeceThe synthesis and characterization of a new line of magnetic hybrid nanostructured materials composed of spinel-type iron oxide to iron carbide nanoparticles grown on nanodiamond nanotemplates is reported in this study. The realization of these nanohybrid structures is achieved through thermal processing under vacuum at different annealing temperatures of a chemical precursor, in which very fine maghemite (γ-Fe<sub>2</sub>O<sub>3</sub>) nanoparticles seeds were developed on the surface of the nanodiamond nanotemplates. It is seen that low annealing temperatures induce the growth of the maghemite nanoparticle seeds to fine dispersed spinel-type non-stoichiometric ~5 nm magnetite (Fe<sub>3−x</sub>O<sub>4</sub>) nanoparticles, while intermediate annealing temperatures lead to the formation of single phase ~10 nm cementite (Fe<sub>3</sub>C) iron carbide nanoparticles. Higher annealing temperatures produce a mixture of larger Fe<sub>3</sub>C and Fe<sub>5</sub>C<sub>2</sub> iron carbides, triggering simultaneously the growth of large-sized carbon nanotubes partially filled with these carbides. The magnetic features of the synthesized hybrid nanomaterials reveal the properties of their bearing magnetic phases, which span from superparamagnetic to soft and hard ferromagnetic and reflect the intrinsic magnetic properties of the containing phases, as well as their size and interconnection, dictated by the morphology and nature of the nanodiamond nanotemplates. These nanohybrids are proposed as potential candidates for important technological applications in nano-biomedicine and catalysis, while their synthetic route could be further tuned for development of new magnetic nanohybrid materials.https://www.mdpi.com/2312-7481/6/4/73magnetic nanohybrid materialsnanodiamondsnanoparticlesiron carbidesFe<sub>3</sub>Cspinel-type iron oxide |
| spellingShingle | Panagiotis Ziogas Athanasios B. Bourlinos Jiri Tucek Ondrej Malina Alexios P. Douvalis Novel Magnetic Nanohybrids: From Iron Oxide to Iron Carbide Nanoparticles Grown on Nanodiamonds Magnetochemistry magnetic nanohybrid materials nanodiamonds nanoparticles iron carbides Fe<sub>3</sub>C spinel-type iron oxide |
| title | Novel Magnetic Nanohybrids: From Iron Oxide to Iron Carbide Nanoparticles Grown on Nanodiamonds |
| title_full | Novel Magnetic Nanohybrids: From Iron Oxide to Iron Carbide Nanoparticles Grown on Nanodiamonds |
| title_fullStr | Novel Magnetic Nanohybrids: From Iron Oxide to Iron Carbide Nanoparticles Grown on Nanodiamonds |
| title_full_unstemmed | Novel Magnetic Nanohybrids: From Iron Oxide to Iron Carbide Nanoparticles Grown on Nanodiamonds |
| title_short | Novel Magnetic Nanohybrids: From Iron Oxide to Iron Carbide Nanoparticles Grown on Nanodiamonds |
| title_sort | novel magnetic nanohybrids from iron oxide to iron carbide nanoparticles grown on nanodiamonds |
| topic | magnetic nanohybrid materials nanodiamonds nanoparticles iron carbides Fe<sub>3</sub>C spinel-type iron oxide |
| url | https://www.mdpi.com/2312-7481/6/4/73 |
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