  We report on the development of a pneumatically coupled graphene membrane
system, comprising of two circular cavities connected by a narrow trench. Both
cavities and the trench are covered by a thin few-layer graphene membrane to
form a sealed dumbbell shaped chamber. Local electrodes at the bottom of each
cavity allow for actuation of each membrane separately, enabling electrical
control and manipulation of the gas flow inside the channel. Using laser
interferometry, we measure the displacement of each drum at atmospheric
pressure, as a function of the frequency of the electrostatic driving force and
provide a proof-of-principle of using graphene membranes to pump attolitre
quantities of gases at the nanoscale.
