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17 April 2014 12:48 pm ,
Vol. 344 ,
Officials last week revealed that the U.S. contribution to ITER could cost $3.9 billion by 2034—roughly four times the...
An experimental hepatitis B drug that looked safe in animal trials tragically killed five of 15 patients in 1993. Now,...
Using the two high-quality genomes that exist for Neandertals and Denisovans, researchers find clues to gene activity...
A new report from the Intergovernmental Panel on Climate Change (IPCC) concludes that humanity has done little to slow...
Astronomers have discovered an Earth-sized planet in the habitable zone of a red dwarf—a star cooler than the sun—500...
Three years ago, Jennifer Francis of Rutgers University proposed that a warming Arctic was altering the behavior of the...
- 17 April 2014 12:48 pm , Vol. 344 , #6181
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ScienceShot: Two-Dimensional Glass
2 February 2012 11:39 am
Researchers have created the world's thinnest pane of glass—and it looks oddly familiar. The glass, made of silicon and oxygen, formed accidentally when the scientists were making graphene, an atom-thick sheet of carbon, on copper-covered quartz. They believe an air leak caused the copper to react with the quartz, which is also made of silicon and oxygen, producing a glass layer with the graphene. The glass is a mere three atoms thick—the minimum thickness of silica glass—which makes it two-dimensional. Although this is the first time such a thin sheet of freestanding glass has been produced, the image above, taken with an electron microscope, isn't entirely new. Reporting in an upcoming issue of Nano Letters, the team notes that it "strikingly resembles" a diagram drawn by a glass theorist attempting to unravel its structure back in 1932 (inset). In the ghostly microscope image, two silicon atoms bound together with an oxygen atom appear as white dots, with oxygen atoms forming gray connecting lines. This network of random-sized rings is mirrored in the old black and white sketch. In addition to demonstrating how graphene makes it possible to produce previously unfeasible 2D-materials, ultra-thin glass could be used in semiconductor or graphene transistors.
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