CRC TRR 61 B02 - Mechanisms for pattern formation in a dynamic self-assembly system

Basic data for this project

Description

The transfer of a Langmuir-Blodgett-phospholipid monolayer from the liquid expanded phase to a solid substrate leads to the formation of horizontal and vertical stripe patterns. A thorough understanding of these pattern forming processes has not yet been achieved. We are going to develop a continuum theory taking into account the fluid motion, surface tension effects due to the organic monolayer and a first order phase transition between the liquid expanded (LE) and the liquid condensed (LC) phases of the organic monolayer. Based on this continuum theory we will determine the bifurcation diagram separating the various dynamical regimes. First we will address the instability leading to horizontal stripes based on the hypothesis of a temporal oscillation of the meniscus. Second, we will consider the transition leading to vertical stripes. We will reveal the mechanisms underlying the selection of the wavelength of the horizontal as well as vertical stripes. This will help us in finding strategies for the selforganized formation of more complex structures. Experiments supporting the development of the theory will be performed in parallel. The perspective of the project is to lay the basis for the development of strategies for the self-organized formation of more complex patterns.