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In-situ Gold Coating of Superparamagnetic Nanoparticles by Microemulsion Method

  • D. K. Kim (a1), M. Mikhailova (a1), M. Toprak (a1), Y. Zhang (a1), B. Bjelke (a2), J. Kehr (a3) and M. Muhammed (a1)...

Abstract

Monodispersed gold coated Superparamagnetic Iron Oxide Nanoparticles (SPION) were prepared in water-in-oil reverse microemulsion (μE) of CTAB (cetyltrimethyl -ammonium bromide)/octane/butanol/water and Brij@97/cyclohexane/water. Gold coated SPION were obtained in the μE system by coprecipitation of magnetite and subsequent reduction of Au on the surface of the magnetite using NaBH4. The SPION were characterized by TEM with EDX, AFM, TGA, ESA, UV-Vis spectroscopy, and SQUID at intermediate and final stages.

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