| 초록 |
Currently, there is enormously widespread interest in nanostructured materials and their size-dependent properties. The synthetic methods used to fabricate metallic and inorganic nanoparticles with tunable nanostructures are well established, whereas the synthetic route for polymeric nanoparticles, especially with dimensions less than 10 nm, has scarcely been exploited. Conducting polymer nanoparticles in this size domain are of particular interest in relation to understanding nucleation of polymer assembly, and the possible consequences of spatial confinement on their optical and electronic properties. Here we report on the facile fabrication of polypyrrole (PPy) nanoparticles with dimensions of several nanometers using low temperature microemulsion polymerization. In addition, this method allows the morphological transition of spherical nanoparticles into structured aggregates by controlling surfactant templating. A lamellar-structured crystalline PPy supramolecular assembly was prepared through surfactant templating. The regularly linked amorphous PPy nanoparticles could play the role of crystalline lattices in the supramolecular assembly, even though PPy has a cross-linked character through α-β coupling. This is the first experimental evidence for crystal formation of amorphous polymer nanoparticles through surfactant templating. |
