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Related Experiment Video

Updated: Mar 23, 2026

A Microfluidic-based Hydrodynamic Trap for Single Particles
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A Microfluidic-based Hydrodynamic Trap for Single Particles

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Stokes trap for multiplexed particle manipulation and assembly using fluidics.

Anish Shenoy1, Christopher V Rao2, Charles M Schroeder3

  • 1Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801;

Proceedings of the National Academy of Sciences of the United States of America
|April 2, 2016
PubMed
Summary
This summary is machine-generated.

Researchers developed the Stokes trap, a novel hydrodynamic trapping method for manipulating multiple particles using only fluid flow. This technique enables fluidic-directed assembly and studies of particle interactions in solution.

Keywords:
Stokesdirected assemblyhydrodynamicmicrofluidicstrapping

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Area of Science:

  • Fluid dynamics
  • Microfluidics
  • Colloidal science

Background:

  • Particle manipulation is crucial across scientific disciplines.
  • Existing methods often require external fields (optical, electric, magnetic).
  • Hydrodynamic trapping offers field-free particle manipulation in solution.

Purpose of the Study:

  • To develop and demonstrate a novel hydrodynamic trapping method.
  • To enable manipulation and assembly of multiple particles using fluid flow.
  • To explore applications in colloidal particle assembly and interaction studies.

Main Methods:

  • Development of the Stokes trap, a microfluidic device.
  • Utilizing controlled fluid flow for particle confinement.
  • Employing model predictive control for simultaneous particle manipulation.

Main Results:

  • Demonstrated simultaneous manipulation of two particles.
  • Showcased fluidic-directed assembly of multiple particles.
  • Validated the Stokes trap as a viable tool for particle manipulation.

Conclusions:

  • The Stokes trap provides a new, field-free method for particle manipulation.
  • This technique facilitates fundamental studies of particle interactions.
  • It offers a novel approach for directed assembly of colloidal particles in solution.