title: A novel method of measuring electrophoretic mobility of gas bubbles.
abstract: Accurate measurement of electrophoretic mobility for gas bubbles is a challenging task as it requires the creation of a desired number of very small air bubbles to ensure negligible rise velocities during the course of the measurement. Here, we report a simple and reliable method for generating stable dispersions of "nano-bubbles." Preparation of such dispersions relies on the nucleation of nano-bubbles in solutions supersaturated with gas. Electrophoretic mobility of these nano-bubbles is determined by the ZetaPALS technique (Brookhaven Instruments) using Uzgiris electrodes coated with palladium. The Smoluchowski limit is assumed in the calculation of zeta potentials. In regard to reproducibility and reliability, this novel method shows a clear advantage over other existing techniques of zeta potential measurement for bubbles.
authors.affiliation: Department of Chemical and Materials Engineering, University of Alberta, Edmonton AB T6G 2G6, Canada.
authors.forename: Aref Seyyed
authors.initials: AS
authors.lastname: Najafi
authors.forename: Jaroslaw
authors.initials: J
authors.lastname: Drelich
authors.forename: Anthony
authors.initials: A
authors.lastname: Yeung
authors.forename: Zhenghe
authors.initials: Z
authors.lastname: Xu
authors.forename: Jacob
authors.initials: J
authors.lastname: Masliyah