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Magnetic properties, phase evolution, hollow structure and biomedical application of hematite (α-Fe2O3) and QUAIPH
dc.creator | Tadić, Marin | |
dc.creator | Panjan, Matjaž | |
dc.creator | Lalatone, Yoann | |
dc.creator | Milošević, Irena | |
dc.creator | Vučetić Tadić, Biljana | |
dc.creator | Lazović, Jelena | |
dc.date.accessioned | 2022-11-08T08:09:30Z | |
dc.date.available | 2022-11-08T08:09:30Z | |
dc.date.issued | 2022 | |
dc.identifier.issn | 0921-8831 | |
dc.identifier.uri | https://vinar.vin.bg.ac.rs/handle/123456789/10477 | |
dc.description.abstract | We investigate synthesis, phase evolution, hollow and porous structure and magnetic properties of quasi-amorphous intermediate phase (QUAIPH) and hematite (α-Fe2O3) nanostructure synthesized by annealing of akaganeite (β-FeOOH) nanorods. It is found that the annealing temperature determines the phase composition of the products, the crystal structure/size dictates the magnetic properties whereas the final nanorod morphology is determined by the starting material. Annealing of β-FeOOH at ∼300 °C resulted in the formation of hollow QUAIPH nanorods. The synthesized material shows low-cytotoxicity, superparamagnetism and good transverse relaxivity, which is rarely reported for QUAIPH. The QUAIPH nanorods started to transform to porous hematite nanostructures at ∼350 °C and phase transformation was completed at 600 °C. During the annealing, the crystal structure changed from monoclinic (akaganeite) to quasi-amorphous and rhombohedral (hematite). Unusually, the crystallite size first decreased (akaganeite → QUAIPH) and then increased (QUAIPH → hematite) during annealing whereas the nanorods retained particle shape. The magnetic properties of the samples changed from antiferromagnetic (akaganeite) to superparamagnetic with blocking temperature TB = 84 K (QUAIPH) and finally to weak-ferromagnetic with the Morin transition at TM = 244 K and high coercivity HC = 1652 Oe (hematite). The low-cytotoxicity and MRI relaxivity (r2 = 5.80 mM−1 s−1 (akaganeite), r2 = 4.31 mM−1 s−1 (QUAIPH) and r2 = 5.17 mM−1 s−1 (hematite)) reveal potential for biomedical applications. | en |
dc.language | en | |
dc.relation | Serbian-Austrian bilateral project [451-03-02141/2017-09/10] (2018-2021) | |
dc.relation | Ministry of Education, Science and Technological Development of the Republic of Serbia | |
dc.rights | restrictedAccess | |
dc.source | Advanced Powder Technology | |
dc.subject | Hematite (α-FeO) | en |
dc.subject | Iron oxide | en |
dc.subject | Magnetic properties (SPION) | en |
dc.subject | Morin transition | en |
dc.subject | Synthesis | en |
dc.title | Magnetic properties, phase evolution, hollow structure and biomedical application of hematite (α-Fe2O3) and QUAIPH | en |
dc.type | article | en |
dc.rights.license | ARR | |
dc.citation.volume | 33 | |
dc.citation.issue | 12 | |
dc.citation.spage | 103847 | |
dc.identifier.wos | 000882175200006 | |
dc.identifier.doi | 10.1016/j.apt.2022.103847 | |
dc.type.version | publishedVersion | |
dc.identifier.scopus | 2-s2.0-85140888541 |
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