High-concentration, surfactant-stabilized graphene dispersions.

  title={High-concentration, surfactant-stabilized graphene dispersions.},
  author={Mustafa Lotya and Paul John King and Umar S. Khan and Sukanta De and Jonathan N Coleman},
  journal={ACS nano},
  volume={4 6},
A method is presented to produce graphene dispersions, stabilized in water by the surfactant sodium cholate, at concentrations up to 0.3 mg/mL. The process uses low power sonication for long times (up to 400 h) followed by centrifugation to yield stable dispersions. The dispersed concentration increases with sonication time while the best quality dispersions are obtained for centrifugation rates between 500 and 2000 rpm. Detailed TEM analysis shows the flakes to consist of 1-10 stacked… CONTINUE READING
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Cationic Surfactant Mediated Exfoliation of Graphite into Graphene Flakes

S. Vadukumpully, J. Paul, S. Valiyaveettil
Carbon 2009, • 2009

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