Generating electrospray form microchip devices using electroosmotic pumping

摘要

A method of generating electrospray from solutions emerg- ing from small channels etched on planar substrates is described, The fluids are delivered using electroosmoti- cally induced pressures and are sprayed electrostatically from the terminus of a channel by applying an electrical potential of sufficient amplitude to generate the electro- spray between the microchip and a conductor spaced from the channel terminus. No major modification of the microchip is required other than to expose a channel opening.