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Title: 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:
 [1];  [2]
  1. (Redwood City, CA)
  2. (Palo Alto, CA)
Issue Date:
Research Org.:
Stanford Linear Accelerator Center (SLAC), Menlo Park, CA
OSTI Identifier:
872473
Patent Number(s):
5943075
Application Number:
08/958476
Assignee:
Board of Trustees of Leland Stanford Junior University (Stanford, CA) SLAC
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 = {1999},
month = {8}
}

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