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Facile and Green Approach To Fabricate Gold and Silver Coated Superparamagnetic Nanoparticles

机译:简便和绿色的方法来制造金和银涂层的超顺磁性纳米粒子

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摘要

Superparamagnetic magnetite nanoparticles are coated with homogeneous gold and silver shells using a simple aqueous based seed mediated method at room temperature with dopamine as a surfactant. Nanoparticles of ALL in the range 2-3 nm are attached to an-Line functionalized Fe3O4 nanoparticles, acting as seed for the growth of ultrathin Au or Ag shells. The monodispersed core-shell nanoparticles Fe3O4@Au and Fe3O4@Ag have a particle size range of 10-13 nm with a shell thickness of approximately 2-3 nm. They are magnetically purified and are superparamagnetic at 300 K with saturated magnetization values of 41 and 35 emu g(-1), respectively.
机译:在室温下,以多巴胺为表面活性剂,采用简单的水基种子介导方法,将超顺磁性磁铁矿纳米粒子涂有均质的金和银壳。 2-3 nm范围内的ALL纳米颗粒附着到在线功能化的Fe3O4纳米颗粒上,充当超薄Au或Ag壳生长的种子。单分散的核-壳纳米颗粒Fe3O4 @ Au和Fe3O4 @ Ag的粒径范围为10-13 nm,壳厚度约为2-3 nm。它们经过磁性净化,在300 K时具有超顺磁性,饱和磁化强度分别为41和35 emu g(-1)。

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