title: The use of acoustoelectrochemistry to investigate rectified diffusion.
abstract: This paper describes the approach to bubble related phenomena using a novel 'acoustoelectrochemical' technique designed to investigate the physical and chemical effects of the acoustically induced motion of the bubble wall. In particular it describes the behaviour of a suspended gas bubble irradiated with sound of an appropriate frequency and pressure to induce bubble wall oscillation. The first electrochemical measurement of the growth of a bubble through rectified diffusion is demonstrated. The technique employed relies on the sensitivity of a scanning electrochemical microscope (SECM) deployed close to the gas/liquid interface of a bubble. The growth rate of the bubble (<0.1 microms(-1)) is reported. It will be also demonstrated that gas exchange across the phase boundary at the bubble wall, can be successfully probed when the bubble is stationary.
authors.affiliation: Department of Chemistry, University of Southampton, Southampton, S017 1BJ, UK. prb2@soton.ac.uk
authors.forename: Peter R
authors.initials: PR
authors.lastname: Birkin
authors.forename: Timothy G
authors.initials: TG
authors.lastname: Leighton
authors.forename: Yvonne E
authors.initials: YE
authors.lastname: Watson