Development of planner polymer devices by using self-organization based on non-equilibrium phenomena

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We have studied the fabrication of planner polymer devices by using self-organization based on non-equilibrium phenomena. Honeycomb-patterned films from various kinds of functional polymers were prepared by casting polymer solutions under humid conditions. Water droplets were condensed onto the solution surface by evaporation cooling, and finally, the micro-porous polymer films were formed after complete evaporation of solvent and template water droplets. Polymer nano-particles were prepared by mixing a poor solvent into a polymer solution, and following evaporation of a good solvent, By using this method, various kinds of polymers including biodegradable, electron conductive, and electro-luminescence polymers were prepared. The particle size was controlled from tens nm to tens micrometer by changing the preparation condition (e.g. concentration of polymer solution, ratio between the poor solvent and polymer solution). Furthermore, we fabricated the hybrid structures of the honeycomb-patterned micro-porous film and functional nanoparticles by casting the water dispersion of nanoparticles onto the UV-Ozone treated honeycomb-patterned films. UV Ozone treatment change the surface properties of the honeycomb-patterned films from hydrophobic to hydrophilic. The polymer nanoparticles were embedded onto the pores of hoenycomb structures by capillary force.