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论文类型：期刊论文

发表时间：2020-07-25

发表刊物：JOURNAL OF ALLOYS AND COMPOUNDS

收录刊物：SCIE

卷号：830

ISSN号：0925-8388

关键字：Magnetic nanoparticle; Curie temperature; Heating efficiency; Magnetic induction hyperthermia

摘要：Magnetic nanoparticles (MNPs) with a suitable Curie temperature and high heating efficiency are desired in magnetic induction hyperthermia (MIH) with self-regulating temperature characteristics. Here, the influence of CP+ substitution on the Curie temperature and heating efficiency (defined as specific absorption rate, SAR) of Zno 54Coo 46CrxFez-x04 (0.45 < x < 0.75) nanoparticles synthesized by hydrothermal method was investigated. With the increasing Cr3+ content, the Curie temperature decreases linearly from 102.5 C to 28.6 C and the SAR decreases from 54.3 W g1 to 7.4 W g-1. Noticeably, when x = 0.7, the MNPs have a SAR of 21.8 W g(-1) and the temperature of the MNPs suspension can self-regulate at 43.8 C, which owns the potential for self-regulating temperature MIH. To our knowledge, the SAR of 21.8 W g(-1), under an alternating magnetic field within the biological safety limit (H.f < 5 x 109 A m(-1) s(-1)), is the highest value for self-regulating temperature MIH. (C) 2020 Elsevier B.V. All rights reserved.