Evolution of Gold nanostructures on Graphene

Epitaxially Driven Formation of Intricate Supported Gold Nanostructures on a Lattice-Matched Oxide Substrate

Abstract ImageDepartment of Engineering Physics, McMaster University, Hamilton Ontario, Canada L8S 4L7, Brockhouse Institute for Materials Research, McMaster University, Hamilton Ontario, Canada L8S 4M1, Center for Emerging Device Technologies, McMaster University, Hamilton, Ontario, Canada L8S 4L8, Department of Macromolecular Science, Fudan University, Shanghai 200433, China, and Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, Canada L8S 4M1

Cover ImageNano Lett., 2009, 9 (12), pp 4258–4263

DOI: 10.1021/nl902491g

* To whom correspondence should be addressed. prestonj@mcmaster.ca., †

Department of Engineering Physics, McMaster University.

, ‡

Brockhouse Institute for Materials Research, McMaster University.

, §

Center for Emerging Device Technologies, McMaster University.

,

Cover ImageFudan University.

, #

Department of Physics and Astronomy, McMaster University.

, ¶

Present address: Department of Mechanical Engineering, Temple University, 1947 N. 12th St., Philadelphia, PA 19122.

Section:

Abstract

A new class of gold nanostructures has been fabricated on the (100), (111), and (110) surfaces of lattice-matched MgAl2O4 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.

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