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Diamond the size of a planet

13.01.2012

The American writer Scott Fitzgerald has a fantastic story "A diamond the size of the Ritz Hotel". Fantasy often pales before reality: Australian astronomers have found a planet in our galaxy that appears to be made of one huge diamond.

In any case, the specific gravity of a planet orbiting the pulsar PSR J1719-1438 is equal to that of a diamond. The diameter of the planet, located in the constellation Serpens at a distance of about 4000 light years, is 55 thousand kilometers, which is 4,3 times the diameter of the earth.

Of course, the material of a new celestial body does not have to be diamond, but astronomers believe that this is some kind of crystalline substance with a density characteristic of diamond. And it is possible that by chemical nature it is really carbon, since it is assumed that the planet was originally a star - a white dwarf, the material of which burned out to carbon in the process of nuclear transformations.

If this is indeed a diamond, then its mass is estimated at 1031 carats.

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Graphene for microchips 17.02.2021

A new study from the University of Sussex (UK) shows that changing the structure of nanomaterials such as graphene can effectively unlock their electronic properties.

"We mechanically create folds in the graphene layer. It's a bit like nano-origami," said Alan Dalton, professor in the School of Mathematics and Physical Sciences at the University of Sussex.

This kind of technology - "straintronics" - allows you to fit more chips inside any device. "Everything we want to do with computers to make them run faster can be done by deforming graphene in this way," he added.

It has been previously shown that deformation of the structure of 2D nanomaterials can reveal their key electronic properties, but the exact effect of various "folds" is still poorly understood.

Scientists from Sussex conducted an in-depth study of the structural changes in graphene, as well as molybdenum disulfide, and the stresses they introduce. They demonstrated how the purposeful deformation of such materials allows you to get the desired electronic component, such as a transistor or logic gate.

The results are likely to resonate with an industry forced to follow Moore's law due to the growing demand for faster computing.

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