Nuvoli, D. Valentini, L. Alzari, V. Scognamillo, S. Bittolo Bon, S. Piccinini, M. Illescas, J. Mariani, A. <br/><br/>
High concentration few-layer graphene sheets obtained by liquid phase exfoliation of graphite in ionic liquid 

 -  2011 
 - Vol. 21, No. 10, pp. 3428-3431 
 = Journal of Materials Chemistry