University of Münster, Institute for Theoretical Physics, Wilhelm-Klemm-Strasse 9, D-48149 Münster, Germany.
Langmuir. 2011 Oct 18;27(20):12354-60. doi: 10.1021/la202728t. Epub 2011 Sep 26.
The influence of the subphase temperature on the stripe pattern formation during Langmuir-Blodgett transfer (LB patterning) is investigated in a combined experimental and theoretical study. According to our experiments on the LB transfer of dipalmitoylphosphatidylcholine (DPPC) on planar mica substrates, even small temperature changes between 21.5 and 24.5 °C lead to significant changes in the monolayer patterns. For a constant surface pressure and dipper speed, the width of the stripes and the overall spatial period of the patterns increase with increasing subphase temperature. Because the stripe patterns are ascribed to alternating monolayer domains in the liquid-expanded and the liquid-condensed phases, the working regime for the formation of stripes is found to depend strongly on the respective surface pressure-area isotherm. These experimental findings are in accordance with the results of a theoretical investigation based on a model that takes hydrodynamics and the monolayer thermodynamics into account.
在一项联合实验和理论研究中，研究了亚相温度对Langmuir-Blodgett 转移（LB 图案化）过程中条纹图案形成的影响。根据我们在平面云母基底上进行的二棕榈酰磷脂酰胆碱（DPPC）LB 转移实验，即使亚相温度在 21.5 和 24.5°C 之间发生微小变化，也会导致单层图案发生显著变化。对于恒定的表面压力和浸渍器速度，条纹的宽度和图案的整体空间周期随亚相温度的升高而增加。因为条纹图案归因于在液体膨胀相和液体凝聚相之间交替的单层域，所以发现形成条纹的工作模式强烈依赖于各自的表面压力-面积等温线。这些实验结果与基于考虑流体动力学和单层热力学的模型的理论研究结果一致。
