| Found in | Work cat.: Graphene : a review of the state of the art and future metrology applications, 2008: p. 1 (Graphene completes the range of remarkable reduced dimension structures containing only the element carbon with sp2 bonding)
Wikipedia www site 29 July 2008 (Graphene is a one-atom-thick planar sheet of sp2-bonded carbon atoms that are densely packed in a honeycomb crystal lattice. It can be viewed as an atomic-scale chicken wire made of carbon atoms and their bonds. The name comes from GRAPHITE + -ENE; graphite itself consists of many graphene sheets stacked together)
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