Synthesis and characterization of nanocomposites based on rare-earth orthoferrites and iron oxides for magnetic hyperthermia applications
| Autor: | L. E. Fernandez-Outon, Edésia Martins Barros de Sousa, André Felipe do Amaral Oliveira, M. L. Hneda, José D. Ardisson |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Nanocomposite Materials science Process Chemistry and Technology Analytical chemistry Infrared spectroscopy 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound Magnetic hyperthermia chemistry Transmission electron microscopy 0103 physical sciences Mössbauer spectroscopy Materials Chemistry Ceramics and Composites Particle size 0210 nano-technology Spectroscopy Magnetite |
| Zdroj: | Ceramics International. 45:17920-17929 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2019.06.009 |
| Popis: | We fabricated and characterized tailored nanocomposites of rare-earth orthoferrites (RFeO3) (R = Nd and Y) and magnetite (Fe3O4). The orthoferrites RFeO3 (R = Nd and Y) were prepared by sol–gel synthesis and added during the co-precipitation synthesis of magnetite in three different nominal concentrations (RFeO3/Fe3O4: 90/10, 50/50, 10/90). X-ray diffraction, Mossbauer spectroscopy, vibrating-sample magnetometry, transmission electron microscopy, ultraviolet–visible spectroscopy, and infrared spectroscopy were employed for structural and magnetic characterizations. The composites exhibited mean particle size distributions in the range of 5–50 nm and a maximum specific absorption rate of 55 W g−1 after 30 min of exposure to an alternating magnetic field of 220 Oe. The results demonstrate that the nanocomposites have ideal characteristics for magneto-hyperthermia applications and thus are promising systems for the treatment of diseases such as cancer. |
| Databáze: | OpenAIRE |
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