Graphene, able to transport huge currents

Posted by on feb 9, 2017 in Resources | 0 comments

Graphene, able to transport huge currents

Once again, graphene has proven itself to be a rather special material: an international research team led by Professor Fritz Aumayr from the Institute of Applied Physics at TU Vienna was able to demonstrate that the electrons in graphene are extremely mobile and react very quickly. Its extraordinary electronic properties make graphene a very promising candidate for future applications in the field of electronics. This is only possible because a sufficient number of electrons can be replaced in the graphene within an extremely short time frame of several femtoseconds (quadrillionths of a second). “The electronic response of the material to the disruption caused by the xenon ion is extremely rapid. Strong currents from neighbouring regions of the graphene film promptly resupply electrons before an explosion is caused by the positive charges repelling one another,” explains Elisabeth Gruber. “The current density is around 1000 times higher than that which would lead to the destruction of the material under normal circumstances – but over these distances and time scales, graphene can withstand such extreme currents without suffering any damage.”
This extremely high electron mobility in graphene is of great significance for a number of potential applications: “The hope is that for this very reason, it will be possible to use graphene to build ultra- fast electronics. Graphene also appears to be excellently suited for use in optics, for example in connecting optical and electronic components,” says Aumayr.

Source: Textile Future

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