A1 Journal article (refereed)
Free-standing 2D metals from binary metal alloys (2020)

Nevalaita, J., & Koskinen, P. (2020). Free-standing 2D metals from binary metal alloys. AIP Advances, 10(6), Article 065327. https://doi.org/10.1063/5.0010884

JYU authors or editors

Publication details

All authors or editors: Nevalaita, Janne; Koskinen, Pekka

Journal or series: AIP Advances

eISSN: 2158-3226

Publication year: 2020

Volume: 10

Issue number: 6

Article number: 065327

Publisher: American Institute of Physics

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1063/5.0010884

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/71005

Abstract

Recent experiments have demonstrated the formation of free-standing Au monolayers by exposing the 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 such as 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 the Au–Ag alloy is smaller than the energy required to break the dealloyed Au monolayer. Our simulations suggest that a similar method could also be used to form Au monolayers from the Au–Cu alloy and Pt monolayers from Pt–Cu, Pt–Ni, and Pt–Pd alloys.

Keywords: alloys

Free keywords: electron beam irradiation; effective medium approximation; 2D materials; alloys

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Ministry reporting: Yes

Reporting Year: 2020

JUFO rating: 1