Science, Space and Technology News 2024
Researchers at Linköping University have successfully created single-atom-thick gold sheets, known as goldene, using a technique inspired by ancient Japanese smiths. Credit: SciTechDaily.comlayer thick. The material has been termed goldene. According to researchers from Linköping University, Sweden, this has given the gold new properties that can make it suitable for use in applications such as carbon dioxide conversion, hydrogen production, and production of value-added chemicals.
“We had created the base material with completely different applications in mind. We started with an electrically conductive ceramics called titanium silicon carbide, where silicon is in thin layers. Then the idea was to coat the material with gold to make a contact. But when we exposed the component to high temperature, the silicon layer was replaced by gold inside the base material,” says Lars Hultman.
By chance, Lars Hultman found a method that has been used in Japanese forging art for over a hundred years. It is called Murakami’s reagent, which etches away carbon residue and changes the color of steel in knife making, for example. But it was not possible to use the exact same recipe as the smiths did. Shun Kashiwaya had to look at modifications:
“The goldene sheets are in a solution, a bit like cornflakes in milk. Using a type of “sieve,” we can collect the gold and examine it using an electron microscope to confirm that we have succeeded. Which we have,” says Shun Kashiwaya.The new properties of goldene are due to the fact that the gold has two free bonds when two-dimensional.
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