Today.Az » Weird / Interesting » Graphene's 'quantum leap' takes electronics a step closer
25 July 2011 [19:51] - Today.Az
The Nobel Prize winning scientists Professor Andre Geim and Professor Kostya Novoselov have taken a huge step forward towards creating electronics from wonder material graphene. Writing in the journal Nature Physics, the academics, who discovered the world's thinnest material at The University of Manchester in 2004, have revealed more about its electronic properties.
Research institutes and universities around the world are already
looking at ways to build devices such as touch-screens, ultrafast
transistors and photodetectors. Now the research from the creators of
the material promises to accelerate that research, and potentially open
up countless more electronic opportunities.
The researchers, from the universities of Manchester, Madrid and
Moscow, have studied in detail the effect of interactions between
electrons on the electronic properties of graphene.
They use extremely high-quality graphene devices which are prepared
by suspending sheets of graphene in a vacuum. This way most of the
unwanted scattering mechanisms for electrons in graphene could be
eliminated, thus enhancing the effect of electron-on-electron
interaction. This is the first effect of its kind where the interactions
between electrons in graphene could be clearly seen.
The reason for such unique electronic properties is that electrons in
this material are very different from those in any other metals. They
mimic massless relativistic particles -- such as photons.
Due to such properties graphene is sometimes called 'CERN on a desk'
-- referencing the Large Hadron Collider in Switzerland. This is just
one of the reasons why the electronic properties are particularly
exciting and often bring surprises.
Professor Geim and Professor Novoselov's pioneering work won them the
Nobel Prize for Physics in 2010 for "groundbreaking experiments
regarding the two-dimensional material graphene."
The pair, who have worked together for more than a decade since
Professor Novoselov was Professor Geim's PHD student, used to devote
every Friday evening to 'out of the box' experiments not directly linked
to their main research topics. One Friday, they used Scotch tape to
peel away layers of carbon from a piece of graphite, and were left with a
single atom thick, two dimensional film of carbon -- graphene.
Graphene is a novel two-dimensional material which can be seen as a
monolayer of carbon atoms arranged in a hexagonal lattice. It possesses a
number of unique properties, such as extremely high electron and
thermal conductivities due to very high velocities of electrons and high
quality of the crystals, as well as mechanical strength.
Professor Novoselov said: "Although the exciting physics which we
have found in this particular experiment may have an immediate
implementation in practical electronic devices, the further
understanding of the electronic properties of this material will bring
us a step closer to the development of graphene electronics." /Science Daily/
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