Electrospray employing corona-assisted cone-jet mode

Details Electrospray employing corona-assisted cone-jet mode Electrospray employing corona-assisted cone-jet mode

1997-02-28

1999-02-23

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

Processes

Including electrostatic charging

239704, B05B 503

Patent

active

058735232

ABSTRACT:
An electrospray apparatus incorporating the invention includes a capillary with an exit for ejecting a fluid, and an electrode positioned downstream from the exit. A gas source is used to establish a region of gas, at least immediately about the exit. A voltage supply creates a potential difference between the capillary exit and the electrode, the potential difference being sufficient to both establish a cone jet mode of operation at the exit of the capillary, to ionize the region of gas about the exit and create a current flow between the exit and the electrode. The current flow exhibits an increased value upon the gas becoming ionized, thus enabling detection of the establishment of a corona. This action creates a corona-assisted cone jet mode of electrospray operation which enables the fluid to disperse into highly uniform sized particles. The preferred gas is carbon dioxide.

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