| Abstract: | Flow-compressed monolayers of stiff rod-like polymers (poly-glutamates) mixed with oleophilic tracer dyes showed significant in-plane dichroism of dye absorption at the water surface, indicating lateral ordering of polyglutamate-rods more or less “perpendicular” to flow direction. During LB-deposition the lateral orientation of dye- and polymer-molecules was maintained, in-plane orientation of the LB-film was thus depending on substrate-orientation relative to flow-direction. Identical monolayers compressed in a regular Langmuir-trough (with moving barrier) showed no large-scale ordering at the water surface, but during film-transfer polymer matrix and dye were oriented in dipping direction, irrespective of substrate orientation relative to compression direction. |
