Facile and Green Approach To Fabricate Gold and Silver Coated Superparamagnetic Nanoparticles
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 Au in the range 2-3 nm are attached to amine functionalized Fe3O4 nanoparticles, acting...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Chemical Society
2009
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| Subjects: | |
| Online Access: | http://ir.unimas.my/id/eprint/9881/1/Facile.pdf http://ir.unimas.my/id/eprint/9881/ http://www.researchgate.net/publication/231232512_Facile_and_Green_Approach_To_Fabricate_Gold_and_Silver_Coated_Superparamagnetic_Nanoparticles |
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| Institution: | Universiti Malaysia Sarawak |
| Language: | English |
| Summary: | 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 Au in the range 2-3 nm are attached to amine 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. |
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