COLL 540 |
| Yoon Seob Lee, James F. Rathman, and Jared Archer. Department of Chemical Engineering, The Ohio State University, 140W, 19th Ave., Columbus, OH 43210 |
| A water-based silica sol containing surfactant micelle and small amounts of collagen was prepared, characterized, and used to synthesize silica/collagen nanocomposites. This sol exhibits remarkable stability; solutions that remain single-phase and transparent at room temperature in a closed container for more than two years have been demonstrated. Synthesis of nanocomposite is achieved by contacting the sol with an aqueous solution or by simple evaporation. Without collagen, the nanostructures produced by this method are strongly sensitive to alkyl chain length of the surfactants, solution pH, and reaction time. Collagen-containing sols exclusively form cubic structures (Pm3n symmetry) over a wide range of these same experimental conditions. The product yield and quality of the long-range nanostructures are also markedly improved by addition of collagen. The role of collagen, especially with regard to its influence on the cooperative self-assembly that gives rise to the observed nanostructures in these systems, will be discussed. |
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Nanoscience and Nanotechnology
2:00 PM-5:15 PM, Thursday, April 1, 2004 Marriott -- Orange County 5, Oral
Division of Colloid and Surface Chemistry |