zeta potential – Page 2 – TechConnect Briefs

The effect of electric field on the surface of nanoparticles (TiO2 & SiO2) and its application to retardation of membrane fouling

Park S-E, Park S-J, Ry D-Y, Kwak J-W, Lee S-W., Park S-E, Park S-J, Associate Professor, Kyungwon University, KR

Since electrostatic device has been practiced for anti-foulant treatment effect on processing the industrial wastewater, the electric force is suspected to induce the alteration of surface charges of colloidal particles in the aspect of reducing [...]

Physicochemical Characterization of Nanosize Zinc Oxide and Titanium Dioxide used as UVR Sunscreen Agents in Cosmetic Formulations

Morfesis A., Fairhurst D., Malvern Instruments, Inc., US

The physical (particulate) sunscreen agents, ZnO and TiO2, are increasingly used to provide UV protection in a wide variety of cosmetic and personal care products. The particle size distribution (PSD) of the ZnO and TiO2 [...]

Study of Sample Dispersion Mechanisms in an Electroosmotically Pumped Microchannel

Debusschere B., Najm H., Matta A., Knio O., Ghanem R., Le Maitre O., Sandia National Laboratories, US

In many microfluidic separation processes, dispersion of sample peaks is a significant problem limiting the detection resolution. In this work, we use simulations to study the dominant dispersion mechanisms during a protein labeling process in [...]

Electroosmotic Flow and Zone Broadening in Microfluidic Channels of Variable Cross-Section and Wall Charge

Ghosal S., Lu Z., Northwestern University, US

Electroosmotic flow is often the method of choice for generating fluid flows in micro fluidic devices. The resulting flow has a characteristic at profile which has the advantage of very low axial dispersion. This is [...]

Electroosmotic Microfluidic Flows with Random Zeta Potential

Gleeson J.P., University College Cork, IR

Average electroosmotic ows in the presence of axially-varying zeta potentials are shown to be plug-like, with variances which depend on radial position across the capillary. Consequences for the dispersion of samples are examined theoretically and [...]