Ultrasonically Aided Electrospray Source for Charged Particles Approaching Monodisperse Distributions

摘要

A method of producing nearly monodisperse electrospray using charged capillary standing waves is investigated. The method, based on the ultrasonically aided electrospray concept, extracts charged particles from a liquid film with induced capillary standing waves at the critical stable condition by applying an electric field. Theoretical analysis on the formation of the charged particles is performed. An experimental ultrasonically aided electrospray system is designed and built to characterize the system operation and the resulting electrospray. The electrospray characterization includes Mie scattering and witness plate analysis. A mode of operation is found, in which the electric field dominates the electrospray production. The particle size and variation reduce with the applied electric field.