Nano Letters 2009-12-01

Epitaxially driven formation of intricate supported gold nanostructures on a lattice-matched oxide substrate.

Gabriel A Devenyi, Jianfeng Li, Robert A Hughes, An-Chang Shi, Peter Mascher, John S Preston

Index: Nano Lett. 9(12) , 4258-63, (2009)

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Abstract

A new class of gold nanostructures has been fabricated on the (100), (111), and (110) surfaces of lattice-matched MgAl(2)O(4) substrates. The nanostructures were fabricated through a synthesis route where a thin gold film dewets, liquefies, and then slowly self-assembles. The supported nanostructures are intricately shaped, crystalline, and epitaxially aligned. Simulations based on a continuum elastic theory indicate that the self-assembly is driven by strained epitaxy and minimization of the surface free energy.