MedGadget -- Two months ago we reported that University of Pennsylvania researchers were able to create a tiny nanopore within graphene, sheet of carbon one atom thick, and detect DNA molecules passing through the opening. Now a collaboration of scientists from Harvard and MIT is reporting in a cover story in Nature that they were able to measure the ionic flow through a nanopore of their own making. They studied the properties of graphene when it’s separating two ionically variable liquids and showed graphene sheets function as “ionic insulators with a very small stable conductance that depends on the ion species in solution.”
