6533b7d7fe1ef96bd12682be

RESEARCH PRODUCT

Dynamics of Structure Formation in Model Membranes and in Adsorbed Layers

subject

description

Unconventional and new ways to prepare ultrathin films with defined lateral distribution of components are described. These methods make use of two different principles: (1) Films with two coexisting phases are prepared and an active component preferentially partitions into one of the phases. Domain formation and interdomain distance largely depend on the kinetics of nucleation and growth and can thus be controlled. This is demonstrated by fluorescence microscopy with monolayers on water surfaces as well as with monolayers formed by co-adsorption of a fatty acid and a dye on silicon. (2) The support is structured by conventional techniques, in our case by photolithography. Adsorption or desorption then occur preferentially on one of the two types of surfaces. It is demonstrated by optical microscopic techniques that this way optically active molecules can be arranged purposefully with a lateral resolution better than 0.5μm and also inorganic particles can be prepared and deposited with high precision.