TITLE

Tailoring the hydraulic impedance of out-of-plane micromachined electrospray sources with integrated electrodes

AUTHOR(S)
Krpoun, R.; Smith, K. L.; Stark, J. P. W.; Shea, H. R.
PUB. DATE
April 2009
SOURCE
Applied Physics Letters;4/20/2009, Vol. 94 Issue 16, p163502
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Hydraulic impedance is a critical parameter for the operation of electrospray emitters, and for preventing flooding when spraying from arrays of emitters. Controlling flow rate by tuning the flow impedance allows accessing different operating modes, such as droplet, ionic, or pulsating. We report on a method to tailor the hydraulic impedance of micromachined capillary out-of-plane emitters with integrated extractor electrodes by filling them with silica microspheres. Spraying the ionic liquid 1-ethyl-3-methylimidazolium tetrafluoroborate (EMI-BF4), we demonstrate the ability to tune from droplet emission to pure ion emission depending on microbead diameter, obtaining stable emission from single emitters and from arrays of 19 emitters.
ACCESSION #
38225303

 

Related Articles

  • Numerical Simulation of Low Reynolds Number Slip Flow Past a Confined Microsphere. Barber, Robert W.; Emerson, David R. // AIP Conference Proceedings;2003, Vol. 663 Issue 1, p808 

    Rapid progress in Micro-Electro-Mechanical Systems (MEMS) technology has led to the development of an increasing number of miniaturised flow devices which involve the manipulation of gases. However, an emerging research issue is the realisation that non-continuum and surface phenomena become...

  • Preparation and Dielectric Property of C/SiO2 Composite via Self-Assembly. Zidong Zhang; Xiujie Ji; Chen Qin; Huimin Wang; Shuhui Chen; Peitao Xie; Runhua Fan // Materials Science Forum;2016, Vol. 848, p369 

    In this paper, C/SiO2 bulk composite was prepared via SiO2 microspheres' self-assembly process combined with heat treatment. SEM and impedance analyzer was used to investigate the microstructure and high-frequency dielectric properties of the composites. The results show that SiO2 microspheres...

  • Fast ERT to estimate pollutants and solid transport variation in water flow: a laboratory experiment. SAMBUELLI, L.; COMINA, C. // Bollettino di Geofisica Teorica ed Applicata;Mar2010, Vol. 51 Issue 1, p1 

    The understanding and evaluation of the phenomena related to pollutants diffusion, solid transport or lithic material deposition within a river have a prominent role in hydraulics and fluvial geomorphology. In this respect, the direct measurement of the amount of transported material is...

  • Alterations in intrauterine electrical impedance in mice measured by four-electrode methods. Yamamoto, M.; Hosono, T.; Igi, C.; Arakawa, M.; Nakamoto, M.; Akasaka, K.; Nakamura, H.; Kimura, T. // Proceedings of the Physiological Society;2013, p383P 

    Recently, biological electrical impedance (EI) has been widely used as a method to assess body constituents. There are two methods for EI measurement: two-electrode (TEM) and four-electrode (FEM) methods. The apparatus for the TEM is generally simple and inexpensive comparing with the FEM, but...

  • Helping the blind to see.  // R&D Magazine;Oct2002, Vol. 44 Issue 10, p42 

    Reports on the plan of several national laboratories and universities to help the blind to see through tiny microelectromechanical systems electrodes. Drawbacks of the project; Developers and sponsor of the project; Information on how the system works when applied to the patient.

  • Use of high direct current bias to separate electrode from bulk impedance. Cohen, Y.; Davidovich, A. // Applied Physics Letters;2/6/1995, Vol. 66 Issue 6, p706 

    Examines the separation of electrode from bulk impedance using high direct current bias. Methods for the generation of separation; Revelation of true bulk impedance; Configurations used in the impedance measurement; Negligence of electrode contribution; Presentation of experimental evidence on...

  • MEMS may help the blind to see.  // Solid State Technology;Dec2002, Vol. 45 Issue 12, p24 

    Describes the use of microelectromechanical systems technology to help some who are blind to see. Use of a tiny camera and an RF transmitter placed in eyeglasses to transmit information; Integration of microdevices into the human eye; Use of electrodes; Improvement of vision.

  • Sample concentration and impedance detection on a microfluidic polymer chip. Alfredo Morales; Pierre Ponce; Luke Lee; Blake Simmons; Rafael Davalos // Biomedical Microdevices;Oct2008, Vol. 10 Issue 5, p661 

    Abstract  We present an on-chip microfluidic sample concentrator and detection triggering system for microparticles based on a combination of insulator-based dielectrophoresis (iDEP) and electrical impedance measurement. This platform operates by first using iDEP to selectively concentrate...

  • Impedance scaling of Applied-B ion diodes. Miller, P. A. // Journal of Applied Physics;3/1/1985, Vol. 57 Issue 5, p1473 

    Provides information on the impedance characteristics of applied-B ion diodes used in inertial confinement fusion research. Usual approach in diode design to estimate impedance; Gap closure due to electrode plasma formation and expansion; Ion diode efficiency and impedance; Effect of the delay...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics