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Bifunctional heterostructures composed of gold nanorods and hematite nanoparticle aggregates are prepared facilely through the hydrothermal decomposition of ferric acetylacetonate on the surface of the nanorods. The gold nanorod in the heterostructure is partially coated with the hematite nanoparticle aggregates. The hematite coating is porous. These heterostructures exhibit both plasmonic and superparamagnetic properties. They are well-dispersed in aqueous solutions. Such heterostructures will be potentially useful for many biotechnological applications., (© 2011 American Chemical Society)

Core-shell Au nanorod-AgAuS nanostructures were hydrothermally prepared from Au nanorods and metal thiobenzoates and then transformed into Au nanoparticle-decorated sulfide nanostructures.

The article discusses research on the anisotropic overgrowth of metal heterostructures induced by a site-selective silica coating. It explains the presentation by anisotropic metal nanostructures of morphology-dependent properties. It also offers information on the role of molecular capping in anisotropic growth systems.