Sol methods
Sols are colloidal suspensions which are normally charge or esterically stabilized. Our sol particles are typically hydrous oxides suspended in aqueous media. However, polymeric organic sols as well as organic-inorganic sols are also possible. We have been developing a variety of “in-situ” techniques for characterizing these systems.
We have developed in situ techniques for characterizing sols in suspension. We use light scattering to characterize the size and state aggregation of our particles. We can watch flocculation or aggregation of particles in real time. We are also utilizing electrophoretic mobility to measure the zeta potential of particles. We also use Attenuated Total Reflection FTIR methods to characterize the chemistry of the interface. This method allows one to utilize infrared spectroscopy in aqueous suspension. pH measurements should be made using high junction potential electrodes. The proton is one of the most important potential determining ions in these systems.
Department of Environmental Chemistry and Technology, University of Wisconsin-Madison
660 North Park Street, Madison, WI 53706
contact us I +1-608-262-2674 I +1-608-446-8160 (cellular)
Professor Marc A. Anderson Lab of Sol-Gel Chemistry
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