Surface Correlation Affects Liquid Order and Slip in a Newtonian Liquid

Details Surface Correlation Affects Liquid Order and Slip in a Newtonian Liquid Surface Correlation Affects Liquid Order and Slip in a Newtonian Liquid

2011-04-05

arxiv.org/abs/1104.0868v1

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

Interfacial slip can enhance fluid flow substantially. Polystyrene (PS) melts show a large difference in slip velocity on top of dodecyl- (DTS) and octadecyl-trichlorosilane (OTS). To study the microscopic origin of this macroscopic effect, we performed x-ray and neutron reflectivity studies characterizing the PS/silane interfaces. The results reveal the molecular conformation of PS at the two silane layers. Differences in the surface order of OTS and DTS are replicated by the adjacent PS. Our findings open a link between the microscopic interfacial structure and liquid slip.

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