Diffusing wave spectroscopy studies of gelling systems

David S. Horne

doi:10.1117/12.44166

1 June 1991 Diffusing wave spectroscopy studies of gelling systems

David S. Horne

Proceedings Volume 1430, Photon Correlation Spectroscopy: Multicomponent Systems; (1991) https://doi.org/10.1117/12.44166
Event: Optics, Electro-Optics, and Laser Applications in Science and Engineering, 1991, Los Angeles, CA, United States

Abstract

The recognition that the transmission of light through a concentrated, opaque system can be treated as a diffusion process has extended the application of photon correlation techniques to the study of particle size, mobility and interactions in such systems. Solutions of the photon diffusion equation are sensitive to the boundary conditions imposed by the geometry of the scattering apparatus. The apparatus, incorporating a bifurcated fiber optic bundle for light transmission between source, sample and detector, takes advantage of the particularly simple solution for a back-scattering configuration. Its ability to measure particle size using monodisperse polystyrene latices and to respond to concentration dependent particle interactions in a study of casein micelle mobility in skim and concentrated milks is demonstrated. Finally, the changes in dynamic light scattering behavior occurring during colloidal gel formation are described and discussed.

Citation Download Citation

David S. Horne "Diffusing wave spectroscopy studies of gelling systems", Proc. SPIE 1430, Photon Correlation Spectroscopy: Multicomponent Systems, (1 June 1991); https://doi.org/10.1117/12.44166

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