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. 2019 Sep 30;12(19):3208. doi: 10.3390/ma12193208

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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A comprehensive demonstration of the optimization of hyperthermia heating efficiency of MFe₂O₄ MNPAs by controlling size, composition, and magnetic coupling among the nanocrystals within the nanoassembly. (A) Heating curves for multi-core and single-core Fe₃O₄ nanostructures are recorded under an ACMF of amplitude 29 kA/m and at frequency 520 kHz [25]. (B) SAR values as a function of the ACMF amplitude at frequency f = 520 kHz for multi-core 24 nm (cyan), multi-core 29 nm (blue), multi-core 22 nm (green), multi-core 20 nm (orange), and single-core 10 nm (red) [25]. (C) The SAR as a function of nanoassembly size of MFe₂O₄ (M = Mn, Fe and Co) with nanocrystal size 4 nm [70]. (D) The SAR as a function of nanoassembly size of MFe₂O₄ with variation of nanocrystal size from 6 to 21 nm [70].