Magnetic nanoparticles coated with gold or silver (M@Au or M@Ag) have found increasing applications in biomedical diagnostics and specific targeting, and in catalytic reactions as well.  A key challenge to the exploration of these applications is the ability to control the core-shell morphology, the magnetic core based function, and the gold or silver based surface chemistry.  In this presentation, recent results in an investigation of the synthesis of the M@Au and M@Ag nanoparticles with controllable size, morphology, magnetic function and surface properties will be discussed.   Examples of the magnetic cores will focus Fe3O4, MnZnFe2O4, NiFe, and other alloy nanoparticles.  In addition to characterization of the magnetic properties, the surface properties of the nanomaterials are characterized by surface plasmon resonance, surface enhanced Raman scattering, biomolecular immobilization, surface catalytic reactivity, and antibacterial activity.  Implications of the findings for a better design of the core-shell nanostructures will also be discussed.

Gold/silver coated magnetic nanoparticles: Synthesis and characterization

244th National Meeting (2012)

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