Graphene Made by Mechanical Exfoliation of Graphite Intercalation Compound

Abstract

We report a method of making few-layer graphene flakes by mechanically exfoliating SbCl 5 –graphite intercalation compounds (GICs). The number of layers of exfoliated graphene flakes had a particular distribution relevant to the stage structure of the GICs. The carrier doping of the few-layer graphene flakes was about two orders of magnitude smaller than that expected from the stoichiometry of the GICs. The measured electric mobility was comparable to that made from pristine graphite.