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  • PhysRevB.86.085442

    Rights statement: ©2012 American Physical Society

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Directed assembly of Ru nanoclusters on Ru(0001)-supported graphene: STM studies and atomistic modeling

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  • Albert K. Engstfeld
  • Harry E. Hoster
  • R. Juergen Behm
  • Lyle D. Roelofs
  • Xiaojie Liu
  • Cai-Zhuang Wang
  • Yong Han
  • James W. Evans
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Article number085442
<mark>Journal publication date</mark>22/08/2012
<mark>Journal</mark>Physical review B
Issue number8
Volume86
Number of pages12
Publication StatusPublished
<mark>Original language</mark>English

Abstract

Directed assembly of an array of Ru nanoclusters (NCs) is achieved by deposition of Ru at around room temperature on a single layer of graphene supported on Ru(0001). In this system, directed assembly is guided by the periodic moire structure of the buckled graphene sheet. Behavior is analyzed utilizing both scanning tunneling microscopy and atomistic lattice-gas modeling together with kinetic Monte Carlo simulation. We elucidate the kinetics of NC nucleation and growth, specifically assessing the coverage dependence of the NC density and height distribution. In addition, we provide a detailed characterization of the development of short-range spatial order within the NC array, identifying a tendency for row formation.

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©2012 American Physical Society