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Related Experiment Videos

Microfluidic solid phase suspension transport with an elastomer-based, single piezo-actuator, micro throttle pump.

I D Johnston1, M C Tracey, J B Davis

  • 1Science and Technology Research Institute, University of Hertfordshire, UK.

Lab on a Chip
|February 24, 2005
PubMed
Summary
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A novel Micro Throttle Pump (MTP) efficiently pumps microparticles using a single piezoelectric element. This innovative design achieves high flow rates and back-pressures for microfluidic applications.

Area of Science:

  • Microfluidics
  • Biomedical Engineering
  • Materials Science

Background:

  • Microfluidic systems require precise fluid handling.
  • Existing micro-pumps face challenges in efficiency and particle handling.

Purpose of the Study:

  • To develop and characterize a novel Micro Throttle Pump (MTP).
  • To demonstrate the MTP's capability in pumping microparticles.

Main Methods:

  • Design and fabrication of an MTP using an elastomeric substrate and a piezoelectric (PZT) element.
  • Characterization of pump performance, including flow rates and back-pressures.
  • Analysis of throttle resistance as a function of actuator deflection.

Main Results:

  • The MTP successfully pumped 5-microm diameter polystyrene beads at high concentrations (4.5 x 10^7 beads/ml).

Related Experiment Videos

  • Maximum flow rates of 132 µl/min (water) and 108 µl/min (bead suspension) were achieved at 800 Hz.
  • Maximum back-pressures of 6 kPa were observed for both fluids.

    • Conclusions:

    • The novel MTP design enables concurrent actuation of pump components via a single PZT element.
    • The MTP demonstrates efficient microparticle pumping, suitable for microfluidic applications.
    • Understanding throttle resistance is key to optimizing MTP performance.