When attempt is made to dislodge the domed disk (elastic modulus = 25 MPa) by uplifting it vertically Figure , a substantial force is required with an unmodified PDMS elastomeric film. Data summarized in Figure show that the adhesion force does not depend substantially on the lifting velocity that varied from 0.5 𝜇𝑚/𝑠 to 750 𝜇𝑚/𝑠 in these experiments. Furthermore, the ) Micrographs of the delaminated region of a 650 m thick film of H-PDMS following the removal of a domed disk shaped adherent under water. The pull-off force decreased with the time of immersion. The pull-off forces are stamped inside the micrographs. of the pseudofoulant. The time dependent force (E) as the domes disk is pulled off the H-PDMS film is plotted as a function of the vertical displacement, which is product of pull-off velocity (150 m/s) and time. (G-J) These micrographs show that a fully developed instability pattern (G) on a PDMS film (650 m thick) disappears (H) when it is exposed to dry air (humidity~ 10%). The pattern reemerges when the film is immersed in distilled water and upon drying it disappears again(J). This sequence exhibits the reversibility of elasto-osmotic stress driven pattern formation on PDMS that can be repeated numerous times. total vertical distance (~ 95 m) travelled by the adherent before its failure from the substrate is nearly independent of the lifting speed. In all cases, the peak force is achieved when the crack diameter is slightly higher than the central bulky region of contact. While it is somewhat difficult to report a failure stress in these experiments, a nominal stress of about 0.5 MPa is estimated by dividing the peak force with the area of delamination corresponding to the maximum pull-off force. Similar detachment force is observed when the joint is submerged in water for a week, thus illustrating that no deterioration of adhesion takes place in water with an unmodified PDMS elastomer. A different story unfolded with H-PDMS films.