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Solid Surface Structure Affects Liquid Order at the Polystyrene/SAM Interface

By Philipp Gutfreund, Oliver Bäumchen, Dorothee van der Grinten, Renate Fetzer, Marco Maccarini, Karin Jacobs, Hartmut Zabel and Max Wolff


We present a combined x-ray and neutron reflectivity study characterizing the interface between polystyrene (PS) and silanized surfaces. Motivated by the large difference in slip velocity of PS on top of dodecyl-trichlorosilane (DTS) and octadecyl-trichlorosilane (OTS) found in previous studies, these two systems were chosen for the present investigation. The results reveal the molecular conformation of PS on silanized silicon. Differences in the molecular tilt of OTS and DTS are replicated by the adjacent phenyl rings of the PS. We discuss our findings in terms of a potential link between the microscopic interfacial structure and dynamic properties of polymeric liquids at interfaces

Topics: Condensed Matter - Soft Condensed Matter, Condensed Matter - Materials Science
Year: 2012
DOI identifier: 10.1103/PhysRevE.87.012306
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