Friday, June 29, 2007

GRAPHENE


The research carried out in 2004 by Andre Geim and Kostya Novoselov at the
Manchester University, UK
on the isolation of graphene, a single layer of graphite is a breakthrough
in chip technology.
Graphene is the first isolated 2D nano-material.
By following the procedure of micromechanical cleavage, the top layers of highly
oriented pyrolytic graphite were peeled with a scotch tape.
The electronic structure and electron-photon inter actions are different for
single, bilayer or few layer graphenes,
approaching the 3D limit of graphite at 10 layers.
The one atomic thick 2D grapheme monolayer sheets are ultra thin and ultra
strong, can be make as highly insulating or highly conductive.

Graphene will soon replace the silicon-based semiconductor electronic devices.

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