COLL 100 |
| Guangzhao Mao, Department of Chemical Engineering and Materials Science, Department of Chemical Engineering and Materials Science, Wayne State University, 5050 Anthony Wayne Drive, Detroit, MI 48202 |
| The ability to control crystal structure, morphology, spatial distribution, and their interactions with one another is critical to technological areas as varied as materials processing, nanocomposites, pharmaceuticals, and sensors. It is particularly challenging to separate organic crystals because of the delicate molecular interactions. The surface effect on organic crystallization is studied systematically by modifying the substrate with organic monolayers. The monolayers contain sites with different nucleation capabilities. The structural correlation is determined by AFM and optical methods at the solid/liquid interface. The crystal morphology is found to correlate with the surface pattern. It is found that charged molecules adsorb along the direction of the highest density of the opposite charge, either along a polymer chain or along a specific lattice direction of the film. Such interactions prove to be effective in morphological control.
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Symposium in Memory of Arthur W. Adamson
8:30 AM-11:50 AM, Monday, March 29, 2004 Marriott -- Orange County 4, Oral
Division of Colloid and Surface Chemistry |