Fabrication of Patterned Polydiacetylene Composite Films Using a Replica-Molding (REM) Technique.

Functional three-dimensional (3D) micropatterns of diacetylene supramolecules embedded in a host polymer have been successfully fabricated by a replica-molding (REM) technique. Dimensional reduction as a result of liquid evaporation during the curing process does not affect the conformational features of the transferred patterns. Polymerization of the diacetylene vesicles using 254 nm UV-light irradiation from the back-side of the transparent substrate induces blue colored polydiacetylene (PDA) micro-images. Interestingly, the polymerization selectively occurs in the molded areas because of the sub-300 nm light blocking property of SU-8. 3D fluorescence patterns are readily obtained by heat treatment of the blue images on the film.