High concentration few-layer graphene sheets obtained by liquid phase exfoliation of graphite in ionic liquid

  title={High concentration few-layer graphene sheets obtained by liquid phase exfoliation of graphite in ionic liquid},
  author={Daniele Nuvoli and Luca Valentini and Valeria Alzari and Sergio Scognamillo and Silvia Bittolo Bon and Massimo Piccinini and Javier Illescas and Alberto Mariani},
  journal={Journal of Materials Chemistry},
In the present work, the use of a commercial ionic liquid as a convenient solvent medium for graphite exfoliation in mild and easy conditions without any chemical modification is presented. To confirm the presence of few layer graphene, its dispersion, which exhibits Tyndall effect, was characterized by Raman and UV spectroscopies, and atomic force and field emission electron microscopies. It is noteworthy that, by gravimetric analysis, a graphene concentration as high as 5.33 mg ml−1 was… Expand
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