Dünne Filme - Steuerung kristalliner Morphologien über Strukturbildung auf mikroheterogenisierten Oberflächen

表面上的非平衡生长过程产生典型的形态特征，这些特征主要受组分向结构单元生长前沿扩散行为的影响。因此，即使对于非常不同的系统，如固化过程的生长模式或底物上细菌的生长模式，扩散限制聚集过程的形态模式也非常相似。对于与非均质表面接触的聚乙烯薄膜的结晶，我们发现结晶和脱湿是相互竞争的过程。采用12-十一抗甲羧酸微接触印刷法制备了具有局部不同自由表面能的化学非均相金表面。在异质化表面上形成的薄膜在不同的表面积内表现出不同的形态特征。薄膜形貌表现出脱湿和扩散控制晶体生长过程的特征。对薄膜的检查最好采用AFM和LVSEM。未来的实验将集中在更详细的研究形态特征（包括超薄聚合物薄膜的晶体精细结构），这些特征与不同尺寸畴的异质表面上的薄膜形成有关。和形状。平行于PE结晶的一种刚性棒聚合物（聚-（二正己基硅烷））在异质化表面上的超薄膜应该被研究。从其他基团的动力学研究中，发现了动力学的表面性质的影响，并根据Avrami动力学进行了量化。我们的实验将集中在聚-（二正己基硅烷）的形态结构如何受到下表面控制的影响。

Non-equilibrium growth processes on surfaces produce typical morphological features which are mainly influenced by the diffusion behaviour of components to the growth front of the structural unit. The morphological patterns from diffusion limited aggregation processes are therefore very similar even for very different systems such as the growth patterns from solidification processes or the growth of bacteria on substrates.For crystallisation in thin films of polyethylene in contact with hererogeneous surfaces we found that crystallisation and dewetting appear as competitive processes. Chemically heterogeneous gold surfaces with locally different free surface energies are prepared by micro-contactprinting with 12-undecanthiocarboxylicacid. The films formed on the heterogenized surfaces exhibit different morphological features within the different surface areas. Film morphologies show features characteristic for dewetting as well as for diffusion controlled crystal growth processes. The examination of films is preferently done by AFM and LVSEM.Future experiments focus on a more detailled investigation between the morphological features (including crystallographic fine structure of ultrathin polymer films) which are related to the film formation on heterogenized surfaces with domains of different size ... and shape.Parallel to the crystallisation PE a rigid-rod polymer (Poly-(di-n-hexylsilan)) in ultrathin films on heteronenized surfaces should be investigated. From kinetical investigations of other groups an influence of surface properties of the kinetics has been found and quantified in terms of Avrami kinetics. Our experiments will focus on the question how morphological structures in the Poly-(di-n-hexylsilan) can be influenced by control of the underlying surface.