Victoria Atkinson is a freelance science journalist, specializing in chemistry and its interface with the natural and human-made worlds. Currently based in York (UK), she formerly worked as a science content developer at the University of Oxford, and later as a member of the Chemistry World editorial team.
The new material, dubbed"goldene," could have important applications in carbon dioxide conversion and hydrogen generation, the researchers said.
"Metals do not like to be lonely," Michael Yeung, a solid-state chemist at the University at Albany, told Live Science in an email."Because the bonding in metals is delocalized, they readily will bond into themselves and agglomerate. Preparing a single layer is quite a feat because you are fighting against the metal's desire to bond with not only itself but with other sheets.
Shun Kashiwaya, an assistant professor in the Department of Physics, Chemistry and Biology at Linkӧping University in Sweden, and colleagues turned this approach on its head to successfully isolate goldene sheets for the first time. To perfect the method, the team experimented with different reaction conditions and concentrations of the etching solution. Crucially, they found that adding a cysteine as a surfactant, or a chemical which decreases the surface tension of a liquid, stabilized the isolated sheets and prevented the gold atoms from clustering and combining into nanoparticles.
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