ZTMD Flow Profiles in Sub-Monolayer Film Thickness Regime

 Lubricant reflow for ZTMD is characterized in the sub-monolayer film thickness regime between 2 and 12 Å. The thickness-dependent diffusion constant, D(h), is quantified. Fickian diffusion using the experimental D(h) values are then used to numerically simulate lubricant flow. A surface viscosity of 300 Pa.s is estimated from the flow profiles.