The effect of electrical double layers on the diffusion of spherical colloidal particles was studied using photon correlation spectroscopy (PCS). The diffusion constant was found to equal that of a neutral particle at low and high electrolyte concentration and was reduced by several percent when the electrical double layer is comparable to the particle radius, in agreement with the general theory for charged particles. / PCS studies of bimodal colloidal dispersions included the experimental verification of the bimodal homodyne autocorrelation function and the introduction of quasi-heterodyne detection. / The effect of electrical double layers on the diffusion of rod shaped colloidal particles was studied with PCS, using tobacco mosaic virus particles as probes. The results are qualitatively similar to those for spherical particles, with the minimum occurring when the double layer is comparable to the radius of an equivalent sphere. / The intensity of the light scattered from latex particles in an evanescent wave was measured as a function of the penetration depth of the evanescent wave. The results were found to be consistent with those predicted from DLVO theory.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.74537 |
| Date | January 1990 |
| Creators | Schumacher, Gerhard A. (Gerhard Arthur) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Doctor of Philosophy (Department of Chemistry.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001171718, proquestno: AAINN66374, Theses scanned by UMI/ProQuest. |
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