The Gañán-Calvo method for utilizing a “virtual nozzle” to produce very small diameter columnar liquid jets is currently the state of the art in the field. This method involves passing a gaseous fluid entraining a liquid fluid through a capillary tube and out an aperture at the end. The gas-dynamic forces exerted by the gaseous fluid provide the...

Existing methods of liquid deposition are either limited to micron-scale resolution or are time-consuming and cumbersome direct-contact techniques. Ink-jet printing has developed over recent years into a preferred method of dispensing liquid micro-droplets for the purpose of printing and microfabrication. This is an accurate, high-throughput, non-contact...