Electrospray ionization using pointed fibers
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United States of America Patent
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Aug 8, 2006
Grant Date -
N/A
app pub date -
Jun 7, 2004
filing date -
Jun 7, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A pointed carbon fiber electrospray ionization emitter has a length of electrically conductive fiber that is present within a lumen of a microfluidic device, and protrudes from the terminus. A point is present on an end of the electrically conductive fiber, or the electrically conductive fiber is otherwise sufficiently small on the end to create a desired spray. A conductor supplies electrical current to the electrically conductive fiber. Fluid to be sprayed is transported through the lumen and out of the terminus of the lumen, and an electrical field established by the conductive fiber distributes and sprays the fluid. The emitter is rugged and is able to generate stable electrospray over a wide range of flow rates, voltages, and surface tension variations.
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