Tuning the dynamics in Fe3O4 nanoparticles for hyperthermia optimization
Tuning the dynamics in Fe3O4 nanoparticles for hyperthermia optimization
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DOI：
10.1063/5.0017903
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发表时间：
2020-08-17
影响因子：
4
通讯作者：
Majetich, Sara A.
中科院分区：
文献类型：
--
作者：
Chen, Hao;Billington, David;Majetich, Sara A.
在不同温度和外加直流磁场下，在10 kHz和4 MHz之间测量了Fe3O4纳米颗粒的交流磁化率（ACS）。在这个频率范围内，静磁相互作用的影响磁化动态，即使是稀释组件。ACS谱的弛豫频率的变化与温度和一个小的DC场的增加。由于弛豫峰值频率和幅度都可以用DC场进行调谐，因此这些结果可以应用于磁热疗应用以优化热传递。
The AC magnetic susceptibility (ACS) of Fe3O4 nanoparticles was measured between 10kHz and 4MHz at different temperatures and in applied DC fields. In this frequency range, magnetostatic interactions impact magnetization dynamics even for dilute assemblies. The ACS spectrum of relaxation frequencies changes both with temperature and the addition of a small DC field. Because both the relaxation peak frequency and amplitude can be tuned with the DC field, these results could be applied to magnetic hyperthermia applications to optimize heat delivery.