Both graphene and 2-D polymers are being studied for similar reasons, C&EN reports. They could do cool things in optics, and their super-tiny pores mean they could be used in high-tech filters. However, 2-D polymers still need work before they can be used in practical applications. For one thing, engineers will have to figure out how to make more of the polymers. Right now, just making a few grams of the stuff is a big feat, as it's taken the scientists years to get the process just right.