• 文献标题:   A mesoscopic model of nanoclusters self-assembly on a graphene Moire
  • 文献类型:   Article
  • 作  者:   KHENNER M, HEBENSTIEL L
  • 作者关键词:  
  • 出版物名称:   JOURNAL OF APPLIED PHYSICS
  • ISSN:   0021-8979 EI 1089-7550
  • 通讯作者地址:  
  • 被引频次:   2
  • DOI:   10.1063/5.0058413
  • 出版年:   2021

▎ 摘  要

A continuum, post-deposition mesoscopic model of a Moire-regulated self-assembly of metal nanoclusters on a twisted bilayer graphene is presented. Quasi-two-dimensional nanocluster-like steady-states at a low adsorbate coverage are analytically determined for Pt, Ni, and Pb adsorbates, pointing that nanoclusters self-assemble at the Moire cell centers. This is followed by the computations of nanoclusters self-assembly dynamics. Differences in the self-assembly efficiency for three chosen metals are highlighted across three typical values of an initial submonolayer coverage and for three temperature regimes. Accounting for the adsorption potential of metal atoms onto graphene leads to a significantly faster nanoclusters self-assembly and has a transient impact on the nanocluster morphologies. A model extensions to the cases of nanoclusters self-assembly on a Moire formed by a monolayer graphene over a metal substrate, and the electromigration-guided self-assembly on such Moire are proposed.