| 초록 |
A simple method of preparing a macroscopic and continuous calcium carbonate film has been developed, where a functional template is not necessary. Transformation from amorphous calcium carbonate to crystalline forms was directly observed. It was proved that the stabilizing effects of substrates and inhibitors result in the formation of a good film. It was shown that amorphous calcium carbonate is a fascinating form of calcium carbonate and it acts important roles in biomineralization and crystallization of calcium carbonate. In application prospects, mosaic single crystal CaCO3 thin films were prepared on the modified poly(ethylene terephthalate)(PET) film. The surface modification of PET film was accomplished by the chemical introduction of carboxylic acid and chemical or physical adsorption of a polyelectrolyte (polyallylamine, PAH) on the thick PET film. On the bare-PET and PAH modified PET at pH 11, spherulitic vaterite CaCO3 films were formed, whrereas mosaic single crystal CaCO3 films were fabricated on the COOH-modified PET and PAH modified PET at pH 8. However, the growing pattern of single crystal CaCO3 was affected by the surface characteristics of the PET surface. This indicates that the nucleation and growth of the ceramic film on the polymeric template can be controlled by the chemical modification and the attachment of ionic polyelectrolyte on the polymeric template. This study was supported by the Center for Nanostructural Materials Technology under the 21st Century Frontier R & D Programs of the Ministry of Science and Technology, Korea. |
