The exfoliationofgraphenesheetshasbeenachievedbyusingcommercialgraphiteinthepresenceof
spherical polymernanoparticlesbasedonpoly(ethyleneglycol).Thepolymernanoparticleswithan
averagediameterof 20 nmwerepreparedbytwodifferentmethodsincludingtheballmillingtech-
niqueandamagneticstirringprocess.Thesenanoparticlesinconjunctionwithanultrasonicationpro-
cedure yieldedgraphenesheetsofaboutthreelayersorless.Thepolymernanoparticlesplayedacrucial
role inthepreparationofthegraphenesheetsthroughawrappingprocess.Thenumberofgraphene
layerscanbetunedbyvaryingthepreparationmethodofthepolymernanoparticles.