20_05/2008Controlled Integration of Nanocrystals in Inverted Hexagonal Nano-Pits at the Surface of Light-Emitting Heterostructures (Adv. Mater. 5/2008)

Hexagonal inverted nanopyramids on gallium-nitride-based multiple quantum wells are exploited to confine gold nanocrystals (NCs) at the surface of such light-emitting heterostructures. The number of NCs incorporated in each pit can be controlled by nanoengineering either the NCs' size or the pit size. Capillarity effects can be used to drive the formation of well-defined assemblies of Au NCs within each pit, as reported by Sérgio Pereira and co-workers on p. 1038.

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