Laminated self-standing covalent organic framework membrane with uniformly distributed subnanopores for ionic and molecular sieving

Abstract

Fabrication of large scale and defect free covalent organic framework (COF) membranes with pores small enough for gas sieving remains challenging. Here, the authors report a scalable fabrication method to grow large area defect free COF membranes and to tune the pore size in the sub-nm region by adjusting the stacking modes of the COF layers.