  Graphene sustains transverse out-of-plane mechanical vibrations (flexural
phonons). At the nanometer scale, these appear as travelling ripples, or
cavities, if excited in counter-phase in alternate multilayers. In this work we
explore by means of classical molecular dynamics simulations the possibility of
using these moving nano-cavities to actively transport hydrogen. We find that
the gas can be efficiently transported for hundreds of nanometers in the wave
propagation direction, before the phonons damp down. Therefore, this effect
could be used to move and pump gases through multilayers graphene based
frameworks.
