Magnetic hyperthermia properties of CoFe2O4 nanoparticles: Effect of polymer coating and interparticle interactions. Issue 19 (1st October 2022)

• Record Type: Journal Article
• Authors: Aslibeiki, B.; Eskandarzadeh, N.; Jalili, H.; Ghotbi Varzaneh, A.; Kameli, P.; Orue, I.; Chernenko, V.; Hajalilou, A.; Ferreira, L.P.; Cruz, M.M.
• Is Part Of: Ceramics international. Volume 48:Issue 19(2022)Part A
• Page Start: 27995
• Page End: 28005
• Publication Date: 2022-10-01
• Subjects: CoFe2O4 nanoparticles -- Polymer coating -- Henkel plot -- Magnetic interactions -- Magnetic hyperthermia; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.06.104
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In this work, CoFe2 O4 magnetic nanoparticles (MNPs) were synthesized by an eco-friendly co-precipitation method. The effect of Triethylene glycol (TEG) coating on the structural, magnetic and magnetothermal properties of MNPs was investigated. The formation of crystalline MNPs with a cubic spinel structure and the single phase state was confirmed by the X-ray diffraction (XRD) and infrared spectra (FT-IR) techniques. The spherical morphology and aggregation of the MNPs, as a sign of the presence of interparticle interactions, were revealed by the field emission scanning electron microscopy imaging. A remarkable result has been found by the SQUID and Mössbauer spectroscopy measurements revealing that the polymer coating increases the saturation magnetization through the control of the metal-oxygen-metal bonds and reduction of the spin disorder at the nanoparticle surface. Furthermore, the Henkel plots indicated a dominant role of the dipole-dipole over exchange magnetic interactions in the samples which affected the heating efficiency of the ferrofluids measured under different AC magnetic fields (2.2, 2.7, and 3.3 mT) with a frequency of 92 kHz showing a linear dependence of the thermal efficiency with the AC field amplitude. It was shown that TEG coating increases the heating efficiency of the CoFe2 O4 MNPs, which was attributed to an increase in saturation magnetization and a decrease in the strength of the magnetic interactions between the coated nanoparticles.