Researchers Endeavoring to Create Graphene-Based Devices
Because of graphene's unique ability to smoothly transfer electrons without any resistance at room temperature, scientists are endeavoring to create graphene-based electronic devices in coming years. Nano-ribbons present in graphene act like optical wave guides to transfer electrons along the edges of material, also called as ballistic transport.
This is not the case with other conductors like copper, the resistance of which increases as electrons travels along the length of the conductor. After analyzing ballistic transport properties in 40 nanometers-wide graphene nanoribbons grown on the edges of three dimensional structures embedded into silicon carbide wafers, researchers found 10 times increase in conductance power of graphene.
In previous studies, many researchers tried to create grapheme-based devices but failed to attain desired band gap necessary to make such devices. But in the novel research, researchers firstly deposited layers of nanoribbons on silicon carbon wafers and then used microelectronics fabrication techniques to scratch patterns on them.
Later, the silicon wafers were heated to about 1,000 degrees Celsius, resulting in extraction of silicon material along the edges, thus allowing smooth transfer of electrons through the material.
The findings throw light on the use of graphene to manufacture new class of electronic devices, completely different from silicon based devices, said Walt de Heer, a Regent's Prof. in School of Physics at the Georgia Institute of Technology. He cited an example of making ultrafast computing system possible by using ballistic property of graphene. The research has been published in the Journal Nature.
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