Magnetic Resonance Studies of Hybrid Nanocomposites Containing Nanocrystalline TiO<sub>2</sub> and Graphene-Related Materials
Nanocomposites based on nanocrystalline titania modified with graphene-related materials (reduced and oxidized form of graphene) showed the existence of magnetic agglomerates. All parameters of magnetic resonance spectra strongly depended on the materials’ modification processes. The reduction of gr...
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| Format: | Article |
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MDPI AG
2022-03-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/6/2244 |
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| author | Nikos Guskos Grzegorz Zolnierkiewicz Ewelina Kusiak-Nejman Aleksander Guskos Konstantinos Aidinis Marta Bobrowska Paweł Berczynski Agnieszka Wanag Iwona Pelech Urszula Narkiewicz Antoni W. Morawski |
| author_facet | Nikos Guskos Grzegorz Zolnierkiewicz Ewelina Kusiak-Nejman Aleksander Guskos Konstantinos Aidinis Marta Bobrowska Paweł Berczynski Agnieszka Wanag Iwona Pelech Urszula Narkiewicz Antoni W. Morawski |
| author_sort | Nikos Guskos |
| collection | DOAJ |
| description | Nanocomposites based on nanocrystalline titania modified with graphene-related materials (reduced and oxidized form of graphene) showed the existence of magnetic agglomerates. All parameters of magnetic resonance spectra strongly depended on the materials’ modification processes. The reduction of graphene oxide significantly increased the number of magnetic moments, which caused crucial changes in the reorientation and relaxation processes. At room temperature, a wide resonance line dominated for all nanocomposites studied and in some cases, a narrow resonance line derived from the conduction electrons. Some nanocomposites (samples of titania modified with graphene oxide, prepared with the addition of water or butan-1-ol) showed a single domain magnetic (ferromagnetic) arrangement, and others (samples of titania modified with reduced graphene oxide) exhibited magnetic anisotropy. In addition, the spectra of EPR from free radicals were observed for all samples at the temperature of 4 K. The magnetic resonance imaging methods enable the capturing of even a small number of localized magnetic moments, which significantly affects the physicochemical properties of the materials. |
| first_indexed | 2024-03-09T13:28:11Z |
| format | Article |
| id | doaj.art-61bcb313254c4b18ad22d20e65ea6dd7 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T13:28:11Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-61bcb313254c4b18ad22d20e65ea6dd72023-11-30T21:21:43ZengMDPI AGMaterials1996-19442022-03-01156224410.3390/ma15062244Magnetic Resonance Studies of Hybrid Nanocomposites Containing Nanocrystalline TiO<sub>2</sub> and Graphene-Related MaterialsNikos Guskos0Grzegorz Zolnierkiewicz1Ewelina Kusiak-Nejman2Aleksander Guskos3Konstantinos Aidinis4Marta Bobrowska5Paweł Berczynski6Agnieszka Wanag7Iwona Pelech8Urszula Narkiewicz9Antoni W. Morawski10Department of Physics, Faculty of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology in Szczecin, al. Piastow 48, 70-311 Szczecin, PolandDepartment of Physics, Faculty of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology in Szczecin, al. Piastow 48, 70-311 Szczecin, PolandDepartment of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian of Technology in Szczecin, Pulaskiego 10, 70-322 Szczecin, PolandDepartment of Physics, Faculty of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology in Szczecin, al. Piastow 48, 70-311 Szczecin, PolandDepartment of Electrical and Computer Engineering, Ajman University, Ajman P.O. Box 346, United Arab EmiratesDepartment of Physics, Faculty of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology in Szczecin, al. Piastow 48, 70-311 Szczecin, PolandDepartment of Physics, Faculty of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology in Szczecin, al. Piastow 48, 70-311 Szczecin, PolandDepartment of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian of Technology in Szczecin, Pulaskiego 10, 70-322 Szczecin, PolandDepartment of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian of Technology in Szczecin, Pulaskiego 10, 70-322 Szczecin, PolandDepartment of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian of Technology in Szczecin, Pulaskiego 10, 70-322 Szczecin, PolandDepartment of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian of Technology in Szczecin, Pulaskiego 10, 70-322 Szczecin, PolandNanocomposites based on nanocrystalline titania modified with graphene-related materials (reduced and oxidized form of graphene) showed the existence of magnetic agglomerates. All parameters of magnetic resonance spectra strongly depended on the materials’ modification processes. The reduction of graphene oxide significantly increased the number of magnetic moments, which caused crucial changes in the reorientation and relaxation processes. At room temperature, a wide resonance line dominated for all nanocomposites studied and in some cases, a narrow resonance line derived from the conduction electrons. Some nanocomposites (samples of titania modified with graphene oxide, prepared with the addition of water or butan-1-ol) showed a single domain magnetic (ferromagnetic) arrangement, and others (samples of titania modified with reduced graphene oxide) exhibited magnetic anisotropy. In addition, the spectra of EPR from free radicals were observed for all samples at the temperature of 4 K. The magnetic resonance imaging methods enable the capturing of even a small number of localized magnetic moments, which significantly affects the physicochemical properties of the materials.https://www.mdpi.com/1996-1944/15/6/2244titaniagraphenemagnetic momentsmagnetic arrangementmagnetic resonance |
| spellingShingle | Nikos Guskos Grzegorz Zolnierkiewicz Ewelina Kusiak-Nejman Aleksander Guskos Konstantinos Aidinis Marta Bobrowska Paweł Berczynski Agnieszka Wanag Iwona Pelech Urszula Narkiewicz Antoni W. Morawski Magnetic Resonance Studies of Hybrid Nanocomposites Containing Nanocrystalline TiO<sub>2</sub> and Graphene-Related Materials Materials titania graphene magnetic moments magnetic arrangement magnetic resonance |
| title | Magnetic Resonance Studies of Hybrid Nanocomposites Containing Nanocrystalline TiO<sub>2</sub> and Graphene-Related Materials |
| title_full | Magnetic Resonance Studies of Hybrid Nanocomposites Containing Nanocrystalline TiO<sub>2</sub> and Graphene-Related Materials |
| title_fullStr | Magnetic Resonance Studies of Hybrid Nanocomposites Containing Nanocrystalline TiO<sub>2</sub> and Graphene-Related Materials |
| title_full_unstemmed | Magnetic Resonance Studies of Hybrid Nanocomposites Containing Nanocrystalline TiO<sub>2</sub> and Graphene-Related Materials |
| title_short | Magnetic Resonance Studies of Hybrid Nanocomposites Containing Nanocrystalline TiO<sub>2</sub> and Graphene-Related Materials |
| title_sort | magnetic resonance studies of hybrid nanocomposites containing nanocrystalline tio sub 2 sub and graphene related materials |
| topic | titania graphene magnetic moments magnetic arrangement magnetic resonance |
| url | https://www.mdpi.com/1996-1944/15/6/2244 |
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