The force setpoint was set at 75 nN for all combinations of probe and sample to prevent plastic deformation of the photopolymer layers. To minimize the influence from viscoelastic behavior, all measurements were performed at a temperature setpoint of 80 °C, which achieves a surface temperature of 46.9 °C ± 3.8°C. The surface temperature was measured using a type K thermocouple (Omega Engineering, Inc.) attached to the AFM cantilever probe holder in contact with the surface.