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Solid surface structure affects liquid order at the polystyrene-self-assembled-monolayer interface

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Bäumchen,  Oliver
Group Dynamics of fluid and biological interfaces, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Citation

Gutfreund, P., Bäumchen, O., Fetzer, R., van der Grinten, D., Maccarini, M., Jacobs, K., et al. (2013). Solid surface structure affects liquid order at the polystyrene-self-assembled-monolayer interface. Physical Review E, 87(1): 012306. doi:10.1103/PhysRevE.87.012306.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0029-7682-D
Abstract
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.