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Related Experiment Video

Updated: May 9, 2026

Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics
12:26

Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics

Published on: August 27, 2013

Flow switching in microfluidic networks using passive features and frequency tuning.

Rachel R Collino1, Neil Reilly-Shapiro, Bryant Foresman

  • 1Department of Mechanical Engineering, University of California Santa Barbara, Santa Barbara, CA 93106, USA.

Lab on a Chip
|July 13, 2013
PubMed
Summary
This summary is machine-generated.

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This study demonstrates precise microfluidic flow control by tuning frequencies, enabling selective fluid switching in microchips. This innovation simplifies hardware for portable diagnostics.

Area of Science:

  • Microfluidics
  • Fluid Dynamics
  • Biotechnology

Background:

  • Controlling fluid flow in microfluidic chips is crucial for developing portable point-of-care diagnostic devices.
  • Existing methods often require complex or bulky hardware.

Purpose of the Study:

  • To develop a novel method for precise and simplified fluid flow control in microfluidic systems.
  • To enable selective flow switching between different pathways on-chip using frequency tuning.

Main Methods:

  • Utilizing frequency tuning to match excitation frequencies with characteristic frequencies of microfluidic network branches.
  • Programming characteristic frequencies by adjusting dimensions and stiffness of passive deformable features coupled to the fluid.
  • Exploiting fluidic inertia to achieve high selectivity in flow switching.

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Assembly and Characterization of an External Driver for the Generation of Sub-Kilohertz Oscillatory Flow in Microchannels
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Assembly and Characterization of an External Driver for the Generation of Sub-Kilohertz Oscillatory Flow in Microchannels

Published on: January 28, 2022

Microfluidic Chips Controlled with Elastomeric Microvalve Arrays
18:11

Microfluidic Chips Controlled with Elastomeric Microvalve Arrays

Published on: October 1, 2007

Related Experiment Videos

Last Updated: May 9, 2026

Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics
12:26

Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics

Published on: August 27, 2013

Assembly and Characterization of an External Driver for the Generation of Sub-Kilohertz Oscillatory Flow in Microchannels
08:32

Assembly and Characterization of an External Driver for the Generation of Sub-Kilohertz Oscillatory Flow in Microchannels

Published on: January 28, 2022

Microfluidic Chips Controlled with Elastomeric Microvalve Arrays
18:11

Microfluidic Chips Controlled with Elastomeric Microvalve Arrays

Published on: October 1, 2007

Main Results:

  • Demonstrated precise, frequency-based flow switching between two on-chip microchannels.
  • Achieved high selectivity with peak frequencies between 1-100 Hz and narrow bandwidths (<25% of peak frequency).
  • Presented a theoretical framework to predict characteristic frequencies based on feature properties.

Conclusions:

  • Frequency-based flow control offers a simplified and miniaturized approach to microfluidic hardware.
  • This method facilitates the design of microchips with multiple fluidic domains for advanced diagnostics.