Researchers tested whether deuterons – nuclei of deuterium – can pass through graphene and its sister material boron nitride. They fully expected deuterons to easily pass through, as existing theory did not predict any difference in permeation for both isotopes.
The researchers were surprised to find that deuterons were not only effectively sieved out by their one atom thick membranes, but were sieved with a high separation efficiency.

Now that is surprising (and a great find). I wonder if there are other monolayers with different cell sizes that can effectively filter isotopes like C12 from C14 or spearate out radioactive waste from contaminated solutions.

Hey, maybe it would provide a cheaper, easier way to separate U-235 from U-238!