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| - Surfactant Self-Assemblies Controlling SpontaneousDewetting
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| Abstract
| - We have examined the structures of surfactant self-assemblies left on substrates as a contact linespontaneously retreats across the surface during an autophobing event. A continuous structural gradientis formed during the spontaneous retreat: from molecules lying down on the surface with low packingdensities in a region never touched by the solution, to molecules standing up with higher packing densitiesin a region where the contact line has moved slowly. Despite significant free volumes within the self-assemblies, there is no evidence of clustering of molecules. We have observed a clear correlation betweenretreating contact line speeds and deposited surfactant structures. The dynamics during at least a laterperiod of the autophobing event is dominated by the time evolution of Young's force dictated by the self-assembly near the contact line.
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