Simultaneous acquisition of Fe3O4 monocrystals: Tunable magnetic properties with various morphologies
Simultaneous acquisition of Fe3O4 monocrystals: Tunable magnetic properties with various morphologies
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同时采集 Fe3O4 单晶：具有各种形貌的可调磁性
DOI：
10.1016/j.pnsc.2019.12.001
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Wan Yanfen
中科院分区：
文献类型：
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作者：
Zheng Zemin;Cao Yiming;Li Zhe;Li Huiyong;Hu Dafeng;Jiang Hao;Geng Xuemin;Lu Jiangwei;Zhang Xudong;Yang Peng;Wan Yanfen
通过一种简便的一步法合成了具有面心立方（fcc）结构和两种不同形态（纳米球和纳米棱柱）的 Fe3O4 纳米颗粒（NP）。合成的 Fe3O4 纳米球和纳米棱柱是单晶且在磁场中可分离。在油胺 (OAm) 与二苄醚的不同体积比下，制备的 Fe3O4NPs 的尺寸范围为 5 至 21 nm。合成中OAm的量可以显着控制Fe3O4NPs的形貌。随着 OAm 含量从 10 ml 增加到 30 ml，多面纳米棱柱收缩，而纳米球增大。当 OAm 含量为 25 ml 时，纳米棱柱减少，同时出现更多的六边形和球形颗粒，这意味着形态从三角形转变为六边形的临界点。磁性还取决于纳米颗粒的形态和尺寸。制备的 Fe3O4NPs 在磁共振成像、靶向药物输送、血液净化和肿瘤热疗等医学应用中具有广阔的应用前景。
Fe3O4nanoparticles (NPs) with a face-centered cubic (fcc) structure and two different morphologies (nanospheres and nanoprisms) were synthesized by a facile one-step method. The synthesized Fe3O4nanospheres and nanoprisms were monocrystalline and separable in a magnetic field. In different volume ratios of oleylamine (OAm) to dibenzyl ether, the sizes of the prepared Fe3O4NPs ranged from 5 to 21 nm. The OAm amount in the synthesis can significantly control the morphology of Fe3O4NPs. As the OAm content increased from 10 ml to 30 ml, the faceted nanoprisms shrank while the nanospheres enlarged. At an OAm content of 25 ml, the nanoprisms diminished while more hexagonal and sphere-like particles appeared, implying a critical point of morphology transition from triangle to hexagon. The magnetic properties also depended on the NP morphology and size. The prepared Fe3O4NPs are promising candidates in medical applications such as magnetic resonance imaging, targeted drug delivery, blood purification, and tumor hyperthermia.