Wettability of the Coating. We also used another method that provided additional insight into this issue. Since contact angle is sensitive to interfacial processes, we performed an experiment in which a small ( diameter of 3.3 mm, volume of half sphere= 10 mm 3 for day 1) air bubble was released over onto a H-PDMS coated glass slide that was pre-immersed in water or salt water at an inclination of 35 o from the horizontal plane. The air bubble adhered to the H-PDMS film as soon as it made contact with it. The initial advancing (or recently advanced) and receding (or recently receded) contact angles were 99 o and 63 o respectively in water; and 99 o and 74 o in 0.6 M salt solution. The contact angles changed to some degree over three days of immersion in distilled and salt water, reaching to 𝜃 𝑎 = 103 𝑜 , 𝜃 𝑟 = 88 𝑜 in distilled water; and 𝜃 𝑎 = 105 𝑜 , 𝜃 𝑟 = 92 𝑜 in salt water, following which the angles changed more slowly. No detachment of bubbles occurred within seven days in distilled water. However, all along, the bubble continued to slide upward, albeit slowly. On the eighth day, the bubble slid all the way upward in distilled water. In salt water, on the other hand, the bubble continued to shrink in size till it disappeared, i.e. the air contained in the bubble was dissolved within the film and/or the surrounding aqueous phase. These experiments coupled with what we learned from UV spectroscopic studies indicate that while small amount of leachate out of the coating may potentially modify the interfacial energetics to some extent, the effect may not strong enough to cause a total loss of interfacial adhesion of the bubble with the coating. A possible scenario may hold for the adhesion of the domed disk with the H-PDMS coating as well. The following experiments support that the increase of roughness due to surface instability may be the primary cause for the reduction of adhesion observed in the experiments described in Figure ).