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Monday, October 10, 2011

Manchester takes key step to graphene electronics

By Nick Flaherty

The team at the University of Manchester that discovered the properties of graphene team have for the first time demonstrated how it can be used inside electronic circuits in the future.
By sandwiching two sheets of graphene with another two-dimensional material, boron nitrate, the team created a graphene 'Big Mac' – a four-layered structure which they say could be the key to replacing the silicon chip.
Because there are two layers of graphene completed surrounded by the boron nitrate, this has allowed the researchers for the first time to observe how graphene behaves when unaffected by the environment.
"Creating the multilayer structure has allowed us to isolate graphene from negative influence of the environment and control graphene's electronic properties in a way it was impossible before," said Dr Leonid Ponomarenko. ""So far people have never seen graphene as an insulator unless it has been purposefully damaged, but here high-quality graphene becomes an insulator for the first time."
The two layers of boron nitrate are used not only to separate two graphene layers but also to see how graphene reacts when it is completely encapsulated by another material.
"We are constantly looking at new ways of demonstrating and improving the remarkable properties of graphene. Leaving the new physics we report aside, technologically important is our demonstration that graphene encapsulated within boron nitride offers the best and most advanced platform for future graphene electronics. It solves several nasty issues about graphene's stability and quality that were hanging for long time as dark clouds over the future road for graphene electronics," he said. "We did this on a small scale but the experience shows that everything with graphene can be scaled up. It could be only a matter of several months before we have encapsulated graphene transistors with characteristics better than previously demonstrated."
Graphene's remarkable properties could lead to bendy, touch screen phones and computers, lighter aircraft, wallpaper-thin HD TV sets and superfast internet connections, to name but a few. A £50m Graphene Global Research and Technology Hub is being set up by the Government to commercialise graphene.
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