Effects of coating molecules on the magnetic heating properties of Au-Fe3O4 heterodimer nanoparticles
Effects of coating molecules on the magnetic heating properties of Au-Fe3O4 heterodimer nanoparticles
复制标题
涂层分子对Au-Fe3O4异二聚体纳米颗粒磁热性能的影响
DOI：
10.1063/1.4964514
复制
发表时间：
2016
影响因子：
4
通讯作者：
T. Itoh
中科院分区：
文献类型：
--
作者：
Y. Yamamoto;J. Ogasawara;H. Himukai;T. Itoh
本文报道了金-磁铁矿(Au-Fe3O4)杂二聚体纳米颗粒在交变磁场作用下的加热特性。采用种子调理和高温分解相结合的方法，制备了油酸和油胺包覆的Au-Fe3O4纳米粒子。采用配体交换法，用二硫代丁二酸(DMSA)取代涂层。用量热法和磁强计测定了OA和DMSA包覆的Au-Fe3O4纳米粒子在室温下的比吸收率(SARS)。合成孔径雷达与磁场H的平方有关，最大H值为4 kA/m，包覆二甲基磺酸的纳米颗粒的合成孔径雷达绝对值约为包覆油酸纳米颗粒的5倍。交流磁滞回线测量表明，相比于OA包覆的NPs，DMSA包覆的NPs的磁体积有所恢复，磁各向异性有所降低。这些结果表明，防护剂在防护剂中的应用。
In this paper, we report the heating properties of gold-magnetite (Au-Fe3O4) heterodimer nanoparticles (NPs) subjected to an alternating magnetic field. The Au-Fe3O4 NPs coated with oleic acid and oleylamine (OA) were synthesized through a method that combines seed mediation and high-temperature decomposition. The coating was replaced with dimercaptosuccinic acid (DMSA) by the ligand-exchange method. The specific absorption rates (SARs) for the OA- and DMSA-coated Au-Fe3O4 NPs coated with OA and DMSA at room temperature were determined through the calorimetric and magnetometric methods. SAR depended on the square of the magnetic field H up to an H value of 4 kA/m. The absolute value of the SAR for DMSA-coated NPs is about fivefold higher than that of the OA-coated NPs. The AC magnetic hysteresis measurements showed the recovery of the magnetic volume and the decrease in the magnetic anisotropy of the DMSA-coated NPs relative to those of the OA-coated NPs. These results suggest that the protective agent in...
影响因子：
8.6
作者：
Yamamoto, Y;Miura, T;Hori, H
通讯作者：
Hori, H