Preparation and Characterization of Fe3O4@Au Nanoparticles Used as Precursor of Ferrofluids

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The Fe3O4 magnetic nanoparticles were prepared through co-precipitation of Fe3+ and Fe2+ with ammonium hydroxide. The initially obtained Fe3O4 nanoparticles were then coated by gold in solution of chloroauric acid through connecting of 3-aminopropyropyl thriethoxysilane (3-APTES) and the obtained Fe3O4@Au nanoparticles were further characterized by X-ray photoelectron spectrum (XPS). During the process, the influences of chloroauric acid, reducing agent, coupling agent and nanoparticles of Fe3O4 were studied. The results showed that core-shell structure Fe3O4@Au particles have diameters of about 20nm in size synthesized from sodium citrate as reducing agent with 10.08 emu/g of saturation magnetization.

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Periodical:

Edited by:

Yiwang Bao, Li Tian and Jianghong Gong

Pages:

415-417

DOI:

10.4028/www.scientific.net/AMR.177.415

Citation:

D. C. Li et al., "Preparation and Characterization of Fe3O4@Au Nanoparticles Used as Precursor of Ferrofluids", Advanced Materials Research, Vol. 177, pp. 415-417, 2011

Online since:

December 2010

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$35.00

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