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Visualization of Surface Gelation Processes in a Doped Sol-Gel Glass
1Center for Supramolecular Science and Department of Chemistry, University of Miami, P.O. Box 249118 Coral Gables, FL 33124-0431 (USA).
Angewandte Chemie (International Ed. in English)
|November 11, 1999
Abstract:
Pulsed photoacoustic spectroscopy has enabled depth-resolved, in situ measurements of the chemical changes that occur in a sol-gel process to be examined. By use of beta-carotene as a probe to determine the efficiency of heat transfer to the immediate molecular environment in thin and thick samples, separate surface and bulk gelation processes in a sol-gel material have been observed.