Subj : Researchers produce thinnest sheet of metal ever using a 100-year
To   : All
From : TechnologyDaily
Date : Fri Apr 26 2024 05:45:05

Researchers produce thinnest sheet of metal ever using a 100-year old 
Japanese technique  Goldene could pave way for super catalysts, ultra high 
density optical storage and much more

Date:
Fri, 26 Apr 2024 04:31:37 +0000

Description:
Researchers at Linkping University (LiU) in Sweden have created Goldene, a 
sheet of gold one atom thick.

FULL STORY
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Described by Nature as the gilded cousin of Graphene, Goldene is a 
one-atom-thick sheet of gold created by scientists from Linkping University 
(LiU) in Sweden. 

It has unique properties that the researchers believe could pave the way for 
applications such as carbon dioxide conversion, hydrogen production, water 
purification, and communication. 

Shun Kashiwaya, a researcher at the Materials Design Division at LiU, 
explains, "If you make a material extremely thin, something extraordinary 
happens. As with Graphene, the same thing happens with gold. As you know, 
gold is usually a metal, but if single-atom-layer thick, the gold can become 
a semiconductor instead." An accidental discovery 

Historically, attempts to create single-atom sheets of gold have been 
hindered due to the metals propensity to lump together. However, the 
successful creation of Goldene was achieved via a century-old Japanese 
smithing technique called Murakamis reagent, which etches away carbon 
residue. For this task the team used an oxidizing reagent. 

To produce Goldene, the researchers used a three dimensional base material 
with layers of gold sandwiched between titanium and carbon. 

There was an element of serendipity to the creation of Goldene however, as 
Lars Hultman, professor of thin film physics at LiU admits. 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. 

The LiU researchers now plan to turn their attention to exploring whether 
other noble metals could undergo a similar process and yield yet more 
unimaginable applications. 

Funding for this research was provided by a range of institutions, including 
the Swedish Research Council, the Swedish Government's Strategic Research 
Area in Materials Science, and Linkping University. More from TechRadar Pro 
Future computers will have chips made with exotic materials Scientists inch 
closer to holy grail of memory breakthrough Scientists build a silicon-less 
computer that use light waves



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Link to news story:
https://www.techradar.com/pro/researchers-produce-thinnest-sheet-of-metal-ever
-using-a-100-year-old-japanese-technique-goldene-could-pave-way-for-super-cata
lysts-ultra-high-density-optical-storage-and-much-more


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