Universal fluid droplet ejector
Abstract
A droplet generator comprises a fluid reservoir having a side wall made of glass or quartz, and an end cap made from a silicon plate. The end cap contains a micromachined aperture through which the fluid is ejected. The side wall is thermally fused to the end cap, and no adhesive is necessary. This means that the fluid only comes into contact with the side wall and the end cap, both of which are chemically inert. Amplitudes of drive pulses received by reservoir determine the horizontal displacements of droplets relative to the ejection aperture. The drive pulses are varied such that the dropper generates a two-dimensional array of vertically-falling droplets. Vertical and horizontal interdroplet spacings may be varied in real time. Applications include droplet analysis experiments such as Millikan fractional charge searches and aerosol characterization, as well as material deposition applications.
- Inventors:
-
- Redwood City, CA
- Palo Alto, CA
- Issue Date:
- Research Org.:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- OSTI Identifier:
- 872473
- Patent Number(s):
- 5943075
- Application Number:
- 08/958476
- Assignee:
- Board of Trustees of Leland Stanford Junior University (Stanford, CA)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01L - CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
B - PERFORMING OPERATIONS B41 - PRINTING B41J - TYPEWRITERS
- DOE Contract Number:
- AC03-76SF00515
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- universal; fluid; droplet; ejector; generator; comprises; reservoir; wall; glass; quartz; cap; silicon; plate; contains; micromachined; aperture; ejected; thermally; fused; adhesive; means; contact; chemically; inert; amplitudes; drive; pulses; received; determine; horizontal; displacements; droplets; relative; ejection; varied; dropper; generates; two-dimensional; array; vertically-falling; vertical; interdroplet; spacings; time; applications; analysis; experiments; millikan; fractional; charge; searches; aerosol; characterization; material; deposition; generator comprises; chemically inert; two-dimensional array; pulses received; silicon plate; drive pulses; fluid reservoir; horizontal displacement; horizontal displacements; fluid droplet; droplets relative; droplet generator; dimensional array; ejection aperture; /347/239/
Citation Formats
Lee, Eric R, and Perl, Martin L. Universal fluid droplet ejector. United States: N. p., 1999.
Web.
Lee, Eric R, & Perl, Martin L. Universal fluid droplet ejector. United States.
Lee, Eric R, and Perl, Martin L. Tue .
"Universal fluid droplet ejector". United States. https://www.osti.gov/servlets/purl/872473.
@article{osti_872473,
title = {Universal fluid droplet ejector},
author = {Lee, Eric R and Perl, Martin L},
abstractNote = {A droplet generator comprises a fluid reservoir having a side wall made of glass or quartz, and an end cap made from a silicon plate. The end cap contains a micromachined aperture through which the fluid is ejected. The side wall is thermally fused to the end cap, and no adhesive is necessary. This means that the fluid only comes into contact with the side wall and the end cap, both of which are chemically inert. Amplitudes of drive pulses received by reservoir determine the horizontal displacements of droplets relative to the ejection aperture. The drive pulses are varied such that the dropper generates a two-dimensional array of vertically-falling droplets. Vertical and horizontal interdroplet spacings may be varied in real time. Applications include droplet analysis experiments such as Millikan fractional charge searches and aerosol characterization, as well as material deposition applications.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Aug 24 00:00:00 EDT 1999},
month = {Tue Aug 24 00:00:00 EDT 1999}
}
Works referenced in this record:
A search for fractional charges in native mercury
journal, February 1986
- Savage, Maureen L.; Bland, Roger W.; Hodges, Christopher L.
- Physics Letters B, Vol. 167, Issue 4