Modification of the Fluctuation Dynamics of Ultrathin Wetting Films

We report on the effect of intermolecular forces fluctuations supported liquid films. Using an optically-induced thermal gradient, we form nanometer-thin films wetting liquids glass substrates, where van der Waals are balanced by thermocapillary forces. show that fluctuation dynamics film interface is strongly modified at lower frequencies. Data spanning three frequency decades in excellent agreement with theoretical predictions accounting for Our results emphasize relevance when fluids confined nanoscale.