Direct exfoliation of natural graphite into micrometre size few layers graphene sheets using ionic liquids
Xiqing WangPasquale F. FulvioGary A. BakerGabriel M. VeithRaymond R. UnocicShannon M. MahurinMiaofang ChiSheng Dai
Abstract
Stable high-concentration suspensions (up to 0.95 mg mL(-1)) of non-oxidized few layer graphene (FLG), five or less sheets, with micrometre-long edges were obtained via direct exfoliation of natural graphite flakes in ionic liquids, such as 1-butyl-3-methyl-imidazolium bis(trifluoro-methane-sulfonyl)imide ([Bmim]-[Tf(2)N]), by tip ultrasonication.
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