Direct exfoliation of natural graphite into micrometre size few layers graphene sheets using ionic liquids.
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.
Wang
Xiqing
X
Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
Fulvio
Pasquale F
PF
Baker
Gary A
GA
Veith
Gabriel M
GM
Unocic
Raymond R
RR
Mahurin
Shannon M
SM
Chi
Miaofang
M
Dai
Sheng
S
D006108:Graphite / Q000737:chemistry*; D052578:Ionic Liquids / Q000737:chemistry*; D010316:Particle Size; D013499:Surface Properties
D052578:Ionic Liquids; D006108:Graphite