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Updated: May 20, 2026

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

Published on: January 21, 2011

Microfluidic sorting with a moving array of optical traps.

Raktim Dasgupta1, Sunita Ahlawat, Pradeep Kumar Gupta

  • 1Laser Biomedical Applications and Instrumentation Division, Raja Ramanna Centre for Advanced Technology, Indore 452013, India. raktim@rrcat.gov.in

Applied Optics
|July 10, 2012
PubMed
Summary
This summary is machine-generated.

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This study demonstrates optical sorting of microspheres using optical traps. This method selectively traps particles based on size and composition, enabling efficient separation from fluid flow.

Area of Science:

  • Physics
  • Optical manipulation
  • Microfluidics

Background:

  • Microsphere separation is crucial in various scientific fields.
  • Existing methods often face limitations in speed and selectivity.
  • Optical forces offer a non-contact method for particle manipulation.

Purpose of the Study:

  • To develop and demonstrate a novel optical sorting technique for microspheres.
  • To leverage the differential forces acting on particles in fluid flow.
  • To achieve high-throughput separation based on particle properties.

Main Methods:

  • Utilized a moving array of optical traps to selectively capture microspheres.
  • Exploited the unique ratio of fluid drag force to optical gradient force for different particle types.

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Last Updated: May 20, 2026

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

A Microfluidic-based Hydrodynamic Trap for Single Particles

Published on: January 21, 2011

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

Use of Dual Optical Tweezers and Microfluidics for Single-Molecule Studies
06:53

Use of Dual Optical Tweezers and Microfluidics for Single-Molecule Studies

Published on: November 18, 2022

  • Demonstrated sorting of silica spheres by size and silica from polystyrene spheres by composition.

    • Main Results:

    • Achieved selective trapping and guiding of microspheres based on size and optical properties.
    • Successfully sorted particles from a fluid flow of approximately 150 μm/s.
    • Obtained a throughput of about 30 particles/s, even with dilute suspensions.

    Conclusions:

    • Optical sorting provides an effective method for separating microspheres.
    • The technique offers high selectivity and throughput for particle manipulation.
    • This approach has potential applications in microfluidic devices and particle-based assays.