Measurement of Wall Zeta Potentials and Their Time-Dependent Changes Due to Adsorption Processes: Liposome Adsorption on Glass
| Autor: | Michael Kaszuba, Malcolm N. Jones, and Malcolm T. Connah, M.D. Reboiras |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Chemistry
Analytical chemistry Surfaces and Interfaces Condensed Matter Physics Condensed Matter::Soft Condensed Matter Electrophoresis Adsorption Electric field Electrochemistry Zeta potential Particle General Materials Science Particle velocity Zeta potential titration Spectroscopy Order of magnitude |
| Zdroj: | Langmuir. 17:5314-5318 |
| ISSN: | 1520-5827 0743-7463 |
| Popis: | A novel method of measuring the zeta potential associated with the planar glass surface of an electrophoresis cell by laser Doppler velocimetry has been developed. The method exploits the observation that the terminal velocity of particles subjected to an electric field is reached at least an order of magnitude more quickly than the establishment of electroosomotic flow at the planar glass surface of the cell. By using a fast field reversal technique so that the particle velocity is unaffected by electroosomic flow in conjunction with a mixed mode measurement, it is possible to obtain the electrophoretic mobility of a particle without the need to make measurements at the stationary layer. In addition, the methods give data for the zeta potential at the cell wall. The cell wall zeta potential is sensitive to adsorption of solutes from solution and may be used to follow both the kinetics of adsorption and to construct an adsorption isotherm. The method has been applied to the study of the adsorption of cati... |
| Databáze: | OpenAIRE |
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