Benetzung lateral strukturierter Polymeroberflächen

提议的项目涉及纳米尺度图案衬底的润湿特性。它包括合适底物的制备和表征以及其润湿特性的研究。两种不同的自组装工艺将用于在分子长度尺度上制造表面能可控变化的表面：(a)选择性吸附B中间嵌段的ABC三嵌段共聚物或选择性吸附骨架的新型接枝共聚物的超薄膜微相分离，以及(B)错切硅单晶的自发切面，随后是掠角金属蒸发。在这两种情况下，化学成分的规则模式形成的特征长度尺度在30和200纳米之间。到目前为止，该项目主要涉及基板表面的生产和表征。此外，还进行了第一次实验来研究均聚物和嵌段共聚物在这种衬底上的润湿性能。在接下来的两年中，这些实验将系统地继续进行。有图案的表面将作为模型基板提供给schwerpunktprogram的其他成员。

The proposed project concerns the wetting properties of nanoscopically patterned substrates. It comprises both the preparation and characterization of suitable substrates and an investigation of their wetting properties. Two different self-assembly processes will be utilized to create surfaces with a controlled variation of surface energy on molecular length scales: (a) micro-phase separation in ultra-thin films of ABC triblock copolymers with selectively adsorbing B middle block or novel graft copolymers with selectively adsorbing backbone, and (b) spontaneous facetting of miscut silicon single crystals followed by glancing angle metal evaporation. In either case, regular patterns of chemical composition are formed with characteristic length scales between 30 and 200 nm. So far, the project has mainly dealt with production and characterization of the substrate surfaces. In addition, first experiments have been performed to study the wetting properties of homopolymers and block copolymers on such substrates. In the following two years, these experiments will be systematically continued. The patterned surfaces will be available as model substrates to other members of the Schwerpunktprogramm.