Model and Experimental Study of Surfactant Solutions and Pure Liquids Contact Angles on Complex Surfaces - Drops and Bubbles in Contact with Solid Surfaces - page 191

Figure 3. SEM images of: (a) Teflon AF coated silicon, (b) plasma etched PTFE, (c) fluorinated etched
aluminum, (d) uncoated AKD and (e) aluminum at higher magnification, showing fine features on top
of larger features seen in (c), showing the dual-scale nature of the topography.
surface tension to allow for comparison between different liquids/solutions. Qua-
sistatic advancing and receding contact angles tests were performed on a home
built apparatus. Contact angles were measured using Axisymmetric Drop Shape
Analysis (ADSA-P) operating in profile, sessile mode [84]. For more details on all
experimental procedures, see reference [78].