Synthesis Of Goldene Comprising Single-Atom Layer Gold (Linköping University)


A technical paper titled “Synthesis of goldene comprising single-atom layer gold” was published by researchers at Linköping University (Sweden).


“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 Ti3C2 from nanolaminated Ti3AuC2, initially formed by substituting Si in Ti3SiC2 with Au. Ti3SiC2 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 ab initio molecular dynamics simulations show that two-dimensional goldene is inherently stable, experiments show some curling and agglomeration, which can be mitigated by surfactants. X-ray photoelectron spectroscopy reveals an Au 4f binding energy increase of 0.88 eV. Prospects for preparing goldene from other non-van der Waals Au-intercalated phases, including developing etching schemes, are presented.”

Find the technical paper here. Published April 2024. Read this related news article from Linköping University.

Kashiwaya, S., Shi, Y., Lu, J. et al. Synthesis of goldene comprising single-atom layer gold. Nat. Synth (2024). https://doi.org/10.1038/s44160-024-00518-4

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