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Self-assembled nanoparticle spirals from two-dimensional compositional banding in thin films

Venkatachalam, Dinesh K.; Fletcher, Neville H; Sood, Dinesh K.; Elliman, Robert G.

Description

A self-assembly process is reported in which spiral patterns of goldnanoparticles form on siliconsurfaces during the epitaxial crystallization of thin gold-silicon alloy layers. This behavior is observed only for gold concentrations above a critical value and is shown to result from two-dimensional compositional banding of a liquid alloy layer during the crystallization process. The compositional banding consists of alternate gold-rich and silicon-rich alloy bands, which are shown to be a...[Show more]

CollectionsANU Research Publications
Date published: 2009-05-28
Type: Journal article
URI: http://hdl.handle.net/1885/17048
Source: Applied Physics Letters
DOI: 10.1063/1.3143666

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