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Updated: Jun 4, 2026

A Microfluidic-based Hydrodynamic Trap for Single Particles
10:13

A Microfluidic-based Hydrodynamic Trap for Single Particles

Published on: January 21, 2011

A microfluidic-based hydrodynamic trap for single particles.

Eric M Johnson-Chavarria1, Melikhan Tanyeri, Charles M Schroeder

  • 1Center for Biophysics and Computational Biology, University of Illinois at Urbana-Champaign, IL, USA.

Journal of Visualized Experiments : Jove
|February 10, 2011
PubMed
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We developed a new microfluidic hydrodynamic trap for precise particle manipulation in free solution. This method enables long-term trapping of micro- and nano-scale particles without external fields.

Area of Science:

  • Physics, Biology, Microfluidics, Nanotechnology

Background:

  • Particle trapping is crucial for molecular and cellular studies.
  • Existing methods (optical, magnetic, electrokinetic, acoustic) have limitations.

Purpose of the Study:

  • Introduce a novel microfluidic hydrodynamic trap for particle confinement and manipulation.
  • Demonstrate long-term trapping of micro- and nano-scale particles in aqueous solutions.

Main Methods:

  • Utilized a cross-slot microfluidic channel geometry to create a planar extensional flow with a fluid stagnation point.
  • Implemented a feedback control algorithm with image acquisition, particle tracking, and active adjustment of fluid flow via pneumatic valves.
  • Employed a custom-built LabVIEW code for real-time control of the fluid stagnation point position.

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Optical Trapping of Nanoparticles
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Optical Trapping of Nanoparticles

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Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles
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Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles

Published on: March 13, 2017

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Last Updated: Jun 4, 2026

A Microfluidic-based Hydrodynamic Trap for Single Particles
10:13

A Microfluidic-based Hydrodynamic Trap for Single Particles

Published on: January 21, 2011

Optical Trapping of Nanoparticles
13:39

Optical Trapping of Nanoparticles

Published on: January 15, 2013

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles
11:54

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles

Published on: March 13, 2017

Main Results:

  • Successfully trapped micro- and nano-scale particles in free solution for extended durations.
  • Achieved precise confinement of single particles within crowded suspensions.
  • Demonstrated a user-friendly, versatile trapping method applicable to arbitrary particles.

Conclusions:

  • Hydrodynamic trapping offers a label-free, non-perturbative method for particle manipulation.
  • This technique eliminates the need for specific particle properties or external force fields.
  • The hydrodynamic trap is a valuable platform for particle analysis and micromanipulation in microfluidic devices.