Graphene is pure carbon in
the form of a very thin, nearly transparent sheet, one atom thick. It is
remarkably strong for its very low weight and it conducts heat and electricity
with great efficiency.
It's the thinnest material you can get -- it's
only one atom thick. A tiny amount can cover a huge area, so one gram could
cover a whole football pitch. It's the strongest material we are aware of
because you can't slice it any further. Of course, we know that atoms can be
divided into elementary particles, but you can't get any material that is
thinner than one atom, or it wouldn't count as a material anymore.
Graphene is stronger than
diamond; it shows extraordinary heat conductance; it conducts electricity a
thousand times better than copper -- the list goes on. We're talking about
probably 20 superlatives which apply to graphene. Another surprise is that you can
just about see it with the naked eye, even though it's only one atom thick!
Graphene nanoribbons (also called nano-graphene ribbons or nano-graphite ribbons),
often abbreviated GNRs, are
strips of graphene with ultra-thin width (<50 nm). Graphene
ribbons were originally introduced as a theoretical model by Mitsutaka Fujita and
co-authors to examine the edge and nanoscale size effect in grapheme.
Just under ten years ago, the
Dutch-British physicist Andre Geim stumbled across a substance that would
revolutionize the way we understand matter and win him and his colleague Kostya
Novoselow the 2010 Nobel Prize for Physics. It was graphene -- a
one atom thin substance. The Professor of Physics at Manchester University talks to
CNN about discovering the first ever 2-dimensional material.
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