04 Feb '13, 10am

Technique paves way for defect-free #graphene.

The team, led by the University of Oxford, uncovered that tiny flakes of graphene form with random orientations when processed using chemical vapour deposition, leaving defects or seams between flakes that grow together. The discovery reveals how these graphene flakes, known as domains, can be lined up by manipulating the alignment of carbon atoms on a relatively cheap copper foil; the atomic structure of the copper surface acts as a guide that controls the orientation of the carbon atoms growing on top of them. A combination of control of this copper guide and the pressure applied during growth makes it possible to control the thickness of these domains, the geometry of their edges and the grain boundaries where they meet – seams that act as obstacles to the smooth progress of electrons necessary to create efficient graphene based electrical and electronic devices. "Curre...

Full article: http://www.newelectronics.co.uk/electronics-news/techniqu...

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