"Unlike in perforated graphene, the pores are all almost the same size. And there's such an incredible number of them that the material behaves like a fine-mesh sieve for molecules." Problematic ...

The outer skin, which wraps three of the four floors, is made of 1/8-inch-thick perforated aluminum panels fastened to an aluminum frame. The frame incorporates bifold doors at each balcony, which ...