If there's a rock star in the world of materials, it's graphene: single-atom–thick sheets of carbon prized for its off-the-charts ability to conduct electrons and for being all but transparent. Those qualities make graphene a tantalizing alternative for use as a transparent conductor, the sort now found in everything from computer displays and flat panel TVs to ATM touch screens and solar cells. But the material has been tough to manufacture in anything larger than flakes a few centimeters across. Now researchers have managed to create rectangular sheets of graphene 76 centimeters in the diagonal direction and even use them to create a working touch-screen display.
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