固体表面结构对聚苯乙烯/SAM界面液相有序性的影响
Solid Surface Structure Affects Liquid Order at the Polystyrene/SAM Interface
摘要：
我们提出了一个组合的X射线和中子反射率的研究表征聚苯乙烯（PS）和硅烷化表面之间的界面。由于PS在十二烷基三氯硅烷（OTS）和十八烷基三氯硅烷（OTS）上的滑移速度存在较大差异，本文选择这两种体系进行研究。结果揭示了PS在硅烷化硅上的分子构象。OTS和OTS的分子倾斜的差异由PS的相邻苯环复制。我们讨论了我们的研究结果在微观界面结构和动态性能的聚合物液体在接口之间的潜在联系。
英文摘要：
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.
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