Wettability and surface free energy of graphene films.

  title={Wettability and surface free energy of graphene films.},
  author={Shiren Wang and Yue Zhang and Noureddine Abidi and Luis Enrique Bergues Cabrales},
  journal={Langmuir : the ACS journal of surfaces and colloids},
  volume={25 18},
Graphene sheets were produced through chemical exfoliation of natural graphite flake and hydrazine conversion. Subsequently, graphene sheets were assembled into a thin film, and microscale liquid droplets were placed onto the film surface for measurement of wettability and contact angle. It is found that a graphene oxide sheet is hydrophilic and a graphene sheet is hydrophobic. Isolated graphene layers seem more difficult to wet in comparison to graphite, and low adhesion work was found in the… CONTINUE READING

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