Cluster Superlattice Membranes

Tobias Hartl, Moritz Will, Davor Čapeta, Rajendra Singh, Daniel Scheinecker, Virginia Boix de la Cruz, Sophia Dellmann, Paolo Lacovig, Silvano Lizzit, Boris V. Senkovskiy, Alexander Grüneis, Marko Kralj, Jan Knudsen, Jani Kotakoski, Thomas Michely, Pantelis Bampoulis

Research output: Contribution to journalArticlepeer-review

4 Citations (SciVal)

Abstract

Cluster superlattice membranes consist of a two-dimensional hexagonal lattice of similar-sized nanoclusters sandwiched between single-crystal graphene and an amorphous carbon matrix. The fabrication process involves three main steps, the templated self-organization of a metal cluster superlattice on epitaxial graphene on Ir(111), conformal embedding in an amorphous carbon matrix, and subsequent lift-off from the Ir(111) substrate. The mechanical stability provided by the carbon-graphene matrix makes the membrane stable as a free-standing material and enables transfer to other substrates. The fabrication procedure can be applied to a wide variety of cluster materials and cluster sizes from the single-atom limit to clusters of a few hundred atoms, as well as other two-dimensional layer/host matrix combinations. The versatility of the membrane composition, its mechanical stability, and the simplicity of the transfer procedure make cluster superlattice membranes a promising material in catalysis, magnetism, energy conversion, and optoelectronics.

Original languageEnglish
Pages (from-to)13629-13637
Number of pages9
JournalACS Nano
Volume14
Issue number10
DOIs
Publication statusPublished - 2020

Subject classification (UKÄ)

  • Condensed Matter Physics
  • Nano Technology

Keywords

  • graphene
  • membranes
  • moiré
  • nanocluster superlattices
  • two-dimensional materials

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