Previous NEMD simulations have shown that interfacial layers, such as graphene sheets or surfactant monolayers adsorbed from solution, 37 can significantly affect the ITR at solid-liquid interfaces. Here we investigate the impact of water nanofilms by computing the ITR for the hydroxylated hematite/PAO4 interface using NEMD simulations. Figure (f) shows a snapshot of a system with a water coverage of 4.0 ML used for both the ITR and the W sl calculations, while an example temperature profile obtained from NEMD simulations is presented in Figure (g). All simulations were performed in LAMMPS 39 using velocity-Verlet integration with a timestep of 0.5 fs. The methods used here follow closely those described in our previous study of anhydrous hematite/PAO4 interfaces. Full details of the methodology are given in the Supporting Information.