The interfacial dynamics of water sandwiched between graphene sheets are governed by the slit width

► Atomic scale characterization and fluxional properties of water molecules near graphene interfaces using molecular dynamics. ► Proximity effects on the structural and dynamical properties of water. ► Local orientation, ordering and solvation dynamics of interfacial water are a strong function of the graphene slit width. ► Vibrational spectra of confined water depends on interface proximity, local confinement and hydrogen bonding status.