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| From pencil marks to quantum computers Posted: 03 Jul 2014 01:23 PM PDT One of the hottest materials in condensed matter research today is graphene. Graphene had an unlikely start: it began with researchers messing around with pencil marks on paper. Pencil "lead" is actually made of graphite, which is a soft crystal lattice made of nothing but carbon atoms. When pencils deposit that graphite on paper, the lattice is laid down in thin sheets. By pulling that lattice apart into thinner sheets -- originally using Scotch tape -- researchers discovered that they could make flakes of crystal just one atom thick.  |
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