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Proceedings Paper

Diffusing wave spectroscopy studies of gelling systems
Author(s): David S. Horne
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Paper 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.

Paper Details

Date Published: 1 June 1991
PDF: 15 pages
Proc. SPIE 1430, Photon Correlation Spectroscopy: Multicomponent Systems, (1 June 1991); doi: 10.1117/12.44166
Show Author Affiliations
David S. Horne, Hannah Research Institute (United Kingdom)

Published in SPIE Proceedings Vol. 1430:
Photon Correlation Spectroscopy: Multicomponent Systems
Kenneth S. Schmitz, Editor(s)

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