Ortsaufgelöste optisch detektierte Einzelmoleküluntersuchungen benetzter Grenzflächen

单个分子在润湿和去湿结构中的扩散行为将通过使用灵敏的荧光成像跟踪它们的轨迹来研究。这可以通过将荧光标记应用于润湿相中的一小部分分子来实现，该分子可以在随后的荧光图像中定位并因此被跟踪。通过比较来自本体的扩散数据和来自两相或三相接触线的扩散数据，可以得到分子在润湿或去湿结构的不同区域中的微观扩散图像。因此，从分子扩散的角度研究预润湿层的演化及其起源具有特殊的意义。通过表面能的变化，系统地分析了该参数对扩散行为的影响。实验中还对分子自由度对表面扩散的影响进行了分子动力学模拟。实验方法也将转移到结构表面和多组分聚合物混合物。

The diffusion behavior of individual molecules in wetting and dewetting structures will be studied by tracking their trajectories using sensitivity fluorescence imaging. This can be achieved by applying fluorescent labels to a very small portion of the molecules in the wetting phase which can be localized in succeeding fluorescence images and thus tracked. By comparing diffusion data from the bulk to those from contact lines of two or three phases a microscopic image of molecular diffusion in different regions of wetting or dewetting structures will be developed. Herby the evolution of prewetting layers and its origin from the viewpoint of molecular diffusion is of special interest. By surface energy variation the influence of this parameter on the diffusion behavior will be analyzed systematically. The experiments are accompanied by simulations of the molecular dynamics concerning the molecular degrees of freedom influence on the surface diffusion. The experimental methods will also be transferred to structured surfaces and multicomponent polymer mixtures.