Wet Versus Dry Friction

We study the dynamics of adhesion of soft objects (rubber bead, vesicles, living cells) on wet substrates by dewetting of the intercalated films, and the friction when the substrate moves at velocity U. Wetting transition are observed above a threshold velocity, leading to a lost of adhesion and a strong decrease of friction. It corresponds to the aquaplaning for cars (or people) stopping on a wet soil.