Oxygen surface functionalization of graphene nanoribbons for transport gap engineering.

  title={Oxygen surface functionalization of graphene nanoribbons for transport gap engineering.},
  author={Alessandro Cresti and Alejandro L{\'o}pez-Bezanilla and Pablo Ordej́on and Stephan Roche},
  journal={ACS nano},
  volume={5 11},
We numerically investigate the impact of epoxide adsorbates on the transport properties of graphene nanoribbons with width varying from a few nanometers to 15 nm. For the wider ribbons, a scaling analysis of conductance properties is performed for adsorbate density ranging from 0.1% to 0.5%. Oxygen atoms introduce a large electron-hole transport asymmetry with mean free paths changing by up to 1 order of magnitude, depending on the hole or electron nature of charge carriers. The opening of a… CONTINUE READING

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