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

被引:79
作者
Chin, Suk Fun [1 ]
Iyer, K. Swaminathan [1 ]
Raston, Colin L. [1 ]
机构
[1] Univ Western Australia, Sch Biomed Biomol & Chem Sci, Ctr Strateg Nanofabricat, Crawley 6009, Australia
基金
澳大利亚研究理事会;
关键词
MAGNETIC NANOPARTICLES; SELECTIVE SYNTHESIS; SIZE; SHELL; PARTICLES; SHAPE;
D O I
10.1021/cg8013199
中图分类号
O6 [化学];
学科分类号
0703 ;
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.
引用
收藏
页码:2685 / 2689
页数:5
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