Graphene, the dancing queen of the two dimensional world, is the hottest material with many hot research topics. It has become the apple of eye for physicists, material scientists, chemists and nanotechnologists across the globe.
For the students working on graphene or want to work on graphene and want to know wheres, hows, whats and whys of the graphene reserach, listed below are the prominent groups across the globe:
1) The group of graphene discoverers at Manchester University - The Pioneeres
http://onnes.ph.man.ac.uk/nano/Publications.html#Graphene
(One can download the journal articles published by the Noble group from this website)