Graphene-converted diamonds offer more possibilities for optoelectronics

Abstract Recently, researchers have found that laminating bilayer graphene under extremely high pressure can turn it into an ultra-thin diamond film. This phenomenon has not occurred in single or multi-layer graphene, and perhaps one day, this may be used to develop ultra-thin protective coatings, or for the potential opening of electronic products...

Recently, researchers have found that laminating bilayer graphene under extremely high pressure can turn it into an ultra-thin diamond film. This phenomenon has not occurred in single or multi-layer graphene, and perhaps one day, this may be used to develop ultra-thin protective coatings or for potential development of electronic products.

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Structural molding, technological breakthrough

Carbon can form different types of materials, from diamond to graphite and to new nanotubes and graphene. These materials exhibit various special properties due to the different carbon bond structure. Making thin layers of material that is comparable or superior to diamond is a constant challenge. The conversion of graphene into diamond remains one of the most surprising and rare topics in materials science.

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Recently, in experimental and theoretical efforts, there have been many transformations of the surface into a diamond structure by surface transformation. This atomic-scale thin layer of diamond film proves to have mechanical properties similar to diamond.

Hardness and diamond are not bad

The discovery was discovered by a team at New York University. They measured the stiffness of the surface by pressing the tip of the graphene into silicon carbide, silicon carbide covered with a different number of graphene layers, and then determining the stiffness by resisting vibration at the continuous oscillation tip.

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The researchers found that monolayer graphene slightly reduced the hardness of the surface, but multiple layers reduced the surface hardness. Surprisingly, however, the double-layered graphene coating makes the surface harder. Even a diamond indenter can't affect it, indicating that it is at least as hard as a diamond. And most importantly, graphene is likely to be fundamentally converted to diamond.

Providing unlimited possibilities for optoelectronics

Crystals between diamond and silicon carbide create a buckle in the graphene on the surface. These distortions provide sufficient conditions for the conversion of graphene sheets into hybrid diamond lattices. However, when there are two or more layers, its hardness is almost the same as that of diamonds.

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Bernardo Neves of the Federal University of Brazil also published evidence that graphene can be converted to diamond under pressure. Previous works may motivate authors to reproduce some of our experimental and theoretical analyses and produce similar results. This research shows that this can show ultra-high mechanical stiffness, and these nanostructures will receive real attention in the future because of their very promising optical and electronic properties. This property was first confirmed and measured. There is an infinite possibility in the advancement of optical and electronic theory in the future.

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