Stamp-sized graphene sheets riddled with holes could be boon for molecular separation
(PHYSorg.com Nanotechnology)

MIT engineers have found a way to directly `pinprick` microscopic holes into graphene as the material is grown in the lab. With this technique, they have fabricated relatively large sheets of graphene (`large,` meaning roughly the size of a postage stamp), with pores that could make filtering certain molecules out of solutions vastly more efficient.