Researchers from India have demonstrated control on the number of Dirac points in graphene by using a superlattice structure. The work is promising in controlling not only the electronic but magnetic and thermo-electric properties of graphene as well.
http://pubs.acs.org/doi/abs/10.1021/nl4006029
http://pubs.acs.org/doi/abs/10.1021/nl4006029