articleNature SynthesisApr 16, 2024HYBRID OA

Synthesis of goldene comprising single-atom layer gold

SKShun KashiwayaYSYuchen ShiJLJun LuDGDavide G. SangiovanniGGGrzegorz Greczyński

Linköping University · Thinfilm (Sweden)

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Abstract

Abstract The synthesis of monolayer gold has so far been limited to free-standing several-atoms-thick layers, or monolayers confined on or inside templates. Here we report the exfoliation of single-atom-thick gold achieved through wet-chemically etching away Ti 3 C 2 from nanolaminated Ti 3 AuC 2 , initially formed by substituting Si in Ti 3 SiC 2 with Au. Ti 3 SiC 2 is a renown MAX phase, where M is a transition metal, A is a group A element, and X is C or N. Our developed synthetic route is by a facile, scalable and hydrofluoric acid-free method. The two-dimensional layers are termed goldene. Goldene layers with roughly 9% lattice contraction compared to bulk gold are observed by electron microscopy. While…

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Topics & keywords

Topics
Keywords
  • Monolayer
  • Hydrofluoric acid
  • van der Waals force
  • X-ray photoelectron spectroscopy
  • Materials science
  • Crystallography
  • Atom (system on chip)
  • Transition metal
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