Graphene (/ˈɡræfiːn/[1]) is an allotrope of carbon consisting of a single layer of atoms arranged in a two-dimensional honeycomb lattice[2][3] nanostructure.[4] The name is derived from "graphite" and the suffix -ene, reflecting the fact that the graphite allotrope of carbon contains numerous double bonds.
https://en.wikipedia.org/wiki/Graphene
Quantum well. Scheme of heterostructure of nanometric dimensions that gives rise to quantum effects.The shaded part with length L shows the region with constant (discrete) valence band.[1]
https://en.wikipedia.org/wiki/Quantum_well
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