• 文献标题:   Directed assembly of Ru nanoclusters on Ru(0001)-supported graphene: STM studies and atomistic modeling
  • 文献类型:   Article
  • 作  者:   ENGSTFELD AK, HOSTER HE, BEHM RJ, ROELOFS LD, LIU XJ, WANG CZ, HAN Y, EVANS JW
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW B
  • ISSN:   2469-9950 EI 2469-9969
  • 通讯作者地址:   Iowa State Univ
  • 被引频次:   18
  • DOI:   10.1103/PhysRevB.86.085442
  • 出版年:   2012

▎ 摘  要

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.