  We utilized the momentum transfer(Q)-dependence of Quasi-Elastic Neutron
Scattering (QENS) to reveal the dynamics of water and ethanol confined in
Graphene Oxide (GO) powder or membranes at different temperatures and in
different orientations. The dynamics was measured across different length and
time scales using several spectrometers. We found reduced diffusivities (up to
30\% in the case of water) and a depression of the transition temperatures.
While water showed near Arrhenius behavior with an almost bulk-like activation
barrier in a temperature range of 280-310 K, the diffusivity of ethanol showed
little temperature dependence. For both water and ethanol, we found evidence
for immobile and mobile fractions of the confined liquid. The mobile fraction
exhibited jump diffusion, with a jump length consistent with the expected
average spacing of hydroxide groups in the GO surfaces. From anisotropy
measurements, we found weak anisotropy in diffusion, with the surprising result
that diffusion was faster perpendicular to membrane than parallel to it.
