Single atoms spied on graphene sliver: Electron microscope spots hydrogen atoms resting on invisible carbon sheet.
Graphene is a single sheet of carbon atoms arranged in a hexagonal pattern. It can be used as a transparent "slide" so that a transmission electon microscope can image individual atoms, even hydrogen, the smallest.
A revolution occurred when it was discovered that the single atom sheets of graphene could be peeled off common graphite using adhesive tape!
Graphene at Wikipedia.
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