6533b7d8fe1ef96bd126b01e
RESEARCH PRODUCT
Free-standing 2D metals from binary metal alloys
Janne NevalaitaPekka Koskinensubject
Condensed Matter - Materials ScienceCondensed Matter - Mesoscale and Nanoscale PhysicsalloysMesoscale and Nanoscale Physics (cond-mat.mes-hall)effective medium approximationMaterials Science (cond-mat.mtrl-sci)FOS: Physical sciencesmetalliseokset2D materialslcsh:Physicslcsh:QC1-999electron beam irradiationdescription
Recent experiment demonstrated the formation of free-standing Au monolayers by exposing Au-Ag alloy to electron beam irradiation. Inspired by this discovery, we used semi-empirical effective medium theory simulations to investigate monolayer formation in 30 different binary metal alloys composed of late d-series metals Ni, Cu, Pd, Ag, Pt, and Au. In qualitative agreement with the experiment, we find that the beam energy required to dealloy Ag atoms from Au-Ag alloy is smaller than the energy required to break the dealloyed Au monolayer. Our simulations suggest that similar method could also be used to form Au monolayers from Au-Cu alloy and Pt monolayers from Pt-Cu, Pt-Ni, and Pt-Pd alloys.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-01-01 |