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Graphene, a material that can be derived from the lead in an ordinary pencil, is on the cusp of transforming everything from touchscreens to tennis rackets.
In a lab off of a shaft-like corridor below the University of Toronto’s old Lassonde Mining Building, PhD student Changhong Cao is employing some strikingly humble equipment: Scotch Tape.
Surrounded by a nuclear microscope and high-powered computers, the mechanical engineer uses the Christmas wrapping staple to peel off the top layers from a square of graphite the size of a Scrabble tile.
That’s the same sort of carbon-based graphite at the centre of every ordinary pencil you’ve ever used. Then, repeatedly folding fresh segments of the tape over the captured graphite smudge, Cao peels off more and more of the carbon layers originally deposited on the sticky surface.
The resulting material — known as graphene — is the strongest on Earth and may now be on the cusp of transforming the world.