Liquid Exfoliation of Defect-Free Graphene

We describe the application of the same approach to the exfoliation of graphite to give graphene in a range of solvents

Jonathan N Coleman


Scholarcy highlights

  • Graphite has been used by man for thousands of years, originally for decorative purposes,1 but later in a range of applications from pencils to lining moulds for cannon balls
  • Graphene is generally fabricated in one of two ways: as very high quality sheets produced in limited quantities by micromechanical cleavage or vapour growth, or a rather defective, graphenelike material, graphene oxide, produced in large quantities
  • A growing number of applications would profit from the availability of a method to produce high quality graphene in large quantities
  • A graphene sheet consists of an atomically thin array of sp2 bonded carbon atoms organized in a planar hexagonal arrangement
  • It is the strongest material known to man10 and has been fabricated into large area transparent conductors
  • We found very good reinforcement as characterised by a doubling in both modulus and strength on addition of <0.5wt% graphene
  • While we have shown these flakes to be useful in a number of applications, we believe the decade will see an explosion in the usage of these materials in a wide range of applications

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