Conduction of water molecules through graphene bilayer

Water conduction across a two-dimensional (2D) graphene bilayer was investigated through molecular dynamic simulations. Different from one-dimensional (1D) nanofluidics in carbon nanotubes (CNTs) where CNT chirality has only a secondary effect, when the bilayer structure is changed from the turbostratic state to the commensurate state, the water infiltration pressure decreases considerably, as energy valleys are formed. Compared with the 1D nanofludics in a CNT, the infiltration pressure of 2D nanofluidics in a graphene bilayer tends to be much lower, primarily because of the additional degree of freedom of water molecular motion.