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 language | English |
---|---|
Pages (from-to) | 13629-13637 |
Number of pages | 9 |
Journal | ACS Nano |
Volume | 14 |
Issue number | 10 |
DOIs | |
Publication status | Published - 2020 |
Subject classification (UKÄ)
- Condensed Matter Physics (including Material Physics, Nano Physics)
- Nano-technology
Free keywords
- graphene
- membranes
- moiré
- nanocluster superlattices
- two-dimensional materials