High-magnetic-moment core-shell-type FeCo-Au/Ag nanoparticles
High-magnetic-moment core-shell-type FeCo-Au/Ag nanoparticles
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DOI：
10.1063/1.2089171
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发表时间：
2005-10-10
影响因子：
4
通讯作者：
Wang, JP
中科院分区：
文献类型：
--
作者：
Bai, JM;Wang, JP
我们开发了一种物理技术，将在线溅射/蒸发过程与集成纳米团簇沉积过程相结合来制备核壳型纳米颗粒。利用该方法制备了粒径可控10-20 nm、Au/Ag壳厚度1-3 nm的高磁矩(Fe60Co40)(核)Au壳和(Fe60Co40)(核)Ag壳超顺磁性纳米粒子。 Au壳不仅具有潜在的生物相容性，而且是防止FeCo纳米粒子氧化的关键。 (Fe60Co40)(核)Au-壳纳米粒子的饱和磁化强度比氧化铁纳米粒子高三倍。这项技术使我们能够独立控制核和壳的尺寸，并为任何其他核壳型纳米颗粒单独选择核和壳材料。 (C) 2005 年美国物理研究所。
We developed a physical technique combining an on-line sputtering/evaporation process with an integrated nanocluster deposition process to prepare core-shell-type nanoparticles. High-magnetic-moment (Fe60Co40)(core)Au-shell and (Fe60Co40)(core)Ag-shell superparamagnetic nanoparticles with controllable particle size of 10-20 nm and Au/Ag shell thickness of 1-3 nm were prepared by using this method. Au shell is not only functional for the potential biocompatibility but also the key to prevent the oxidation of FeCo nanoparticles. Saturation magnetization of (Fe60Co40)(core)Au-shell nanoparticles was found three times higher than that of iron oxide nanoparticles. This technique enables us to control independently the dimensions of core and shell and select individually materials for core and shell for any other core-shell-type nanoparticles. (C) 2005 American Institute of Physics.