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arXiv 1302.6912cond-mat.mtrl-sci
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Fe3O4纳米粒子磁热疗:粒径对能量吸收的影响

Magnetic Hyperthermia with Fe3O4 nanoparticles: the Influence of Particle Size on Energy Absorption

Gerardo F. Goya, Enio Lima,, Amanda D. Arelaro, Teobaldo E. Torres, Hercilio R. Rechenberg, Liane Rossi, Clara Marquina, M. Ricardo Ibarra

摘要:

我们研究了一系列平均粒径为3 ~ 26 nm的Fe 3 O 4磁性纳米粒子的磁性和功率吸收特性<d>。加热实验作为粒度的函数揭示了比功率吸收(SPA)值的强烈增加,为<d>= 25-30 nm的颗粒。另一方面,这些MNP的饱和磁化强度MS值对于大于10 nm的颗粒保持基本恒定<d>,表明吸收机制不由MS确定。获得的最大SPA值为130 W/g,对应于平均尺寸值为17和26 nm的双峰颗粒分布。

英文摘要:

We have studied the magnetic and power absorption properties of a series of magnetic nanoparticles (MNPs) of Fe3O4 with average sizes <d> ranging from 3 to 26 nm. Heating experiments as a function of particle size revealed a strong increase in the specific power absorption (SPA) values for particles with <d> = 25-30 nm. On the other side saturation magnetization MS values of these MNPs remain essentially constant for particles with <d> above 10 nm, suggesting that the absorption mechanism is not determined by MS. The largest SPA value obtained was 130 W/g, corresponding to a bimodal particle distribution with average size values of 17 and 26 nm.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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