Laterale Selbstorganisation an Grenzflächen durch inter- und intramolekulare Wechselwirkung

通过这一提议，我们希望增加作为分子结构、分子间相互作用和相邻界面作用力的函数的聚合物润湿和薄膜领域的基础知识。为此，我们研究了空气/水界面的柔性大分子，并利用了以下几点：(I)人们可以很容易地确定和调节表面浓度(Ii)薄膜可以更快地达到平衡，因为流体子相(Iii)人们可以非常容易地从侧压/面积等温线的形状确定相变。除了对这些体系的热力学进行完整的表征外，我们还想用镜面X射线和中子反射率来表征沿法线到薄膜的聚合物链段的密度分布，并使用镜外同步反射和扫描力显微镜来获得关于横向结构的信息。

With this proposal we want to increase the fundamental knowledge in the field of wetting and thin films of polymers as a function of the molecular architecture, intermolecular interactions and the forces due to the adjacent interfaces. For this purpose we investigate flexible macromolecules at the air/water interface and take advantage of the following points: (i) one can easily determine and tune the surface concentration (ii) the thin films can reach equilibrium faster, because of the fluid subphase (iii) one can quite easily determine phase transitions from the shape of the lateral pressure/area isotherms.Besides a complete characterization of the thermodynamics of these systems we want to characterize the density profile of the polymer segments along the normal to the thin film using specular x-ray and neutron reflectivity and obtain information on the lateral structure using off-specular synchrotron reflectometry and scanning force microscopy.