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Abstract:
We investigate experimentally the lateral flow in thin liquid adsorbate films on substrates with variable roughness. We find that, as a consequence of nanoscale roughness, the ability of the films to equilibrate lateral fluctuations depends remarkably weakly on film thickness. Our results suggest that it is a quite general feature of adsorbate films on "real" surfaces. This is of substantial importance for all systems in which transport in adsorbed layers plays a role.
