Preparation of the pseudo foulants. Preparation of the dome shaped disk adherent required several steps as follows. First, a PDMS substrate used to prepare the adherent was made by mixing a 10:1 ratio of sylgard 184 elastomeric base and the cross linker. After degassing the above mixture under gentle vacuum for half an hour, it was transferred to a polystyrene petri dish, cured in an oven at 70° for 1 h. A steel ball (diameter 4 mm) was gently placed on a (5 l) drop of a clear weld epoxy (1:1 mixture of resin and hardener) that was pre-deposited on a PDMS substrate. The PDMS substrate containing several such steel balls was left undisturbed overnight to ensure that the epoxy adhesive was fully solidified, following which, it was encapsulated with degassed Sylgard-184 and heated to 60 °C for 3 hrs. The negative image of the steel ball-epoxy structure as transferred to PDMS comprised of dimples where the steel balls were. Each dimples was then filled with 0.12 g of a hot melt epoxy and covered with a rigid glass plate, following which it was pressed down with an additional 250 g weight. The mold was heated gradually on the hot plate for 10 minutes until the temperature reached 250 0 C . This procedure re-melted the epoxy thus allowing it flow and conform to the dimpled PDMS. Where the liquid adhesive merged (outside the dimples), it formed a thin continuous film. After allowing the structure to cool down to room temperature, the epoxy mold was gently separated from PDMS. Finally, a sharp stainless-steel needle was used to cut out a circular domed disc using a motorized shaft rotating at a speed of 50 RPM.