COLL 463 |
| Dionisios G Vlachos, Department of Chemical Engineering, Department of Chemical Engineering, University of Delaware, 325, Colburn Lab, Newark, DE 19716 |
| Understanding hierarchical supramolecular-precursor assembly to form complex organic-inorganic structures with crystalline order is central in synthetic efforts for new materials ranging from substrates for quantum confinement and laser applications to biomaterial implants with controlled porosity and microstructure. The synthesis of pure silica zeolites in the presence of organic cations is one of the simplest examples of such a hierarchical assembly process. It involves cooperative weak interactions (e.g., van der Waals forces between the inorganic fragments and the organic ions) directing the formation of a covalently linked periodic oxide framework. Despite intensive work devoted to zeolite growth, the nucleation and growth mechanisms remain poorly understood. In this talk, the nucleation and growth mechanisms of zeolite nanoparticles and membranes will be discussed. A variety of molecular scale and continuum scale simulations will be presented to analyze experiments ranging from small angle neutron scattering (SANS) to NMR to dynamic light scattering (DLS) to microscopy and XRD. |
|
Ipatieff Award Symposium Honoring Raul Lobo
2:00 PM-4:30 PM, Wednesday, March 31, 2004 Marriott -- Grand Ballroom K, Oral
Division of Colloid and Surface Chemistry |