Nature Nanotechnology 3, 101 - 105 (2008) Processable aqueous dispersions of graphene nanosheets Dan Li1, Marc B. Müller1, Scott Gilje2, Richard B. Kaner2 & Gordon G. Wallace http://www.nature.com/nnano/journal/v3/n2/full/nnano.2007.451.h Thank you very much.