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Related Experiment Video

Updated: Jun 3, 2026

In Situ Mapping of the Mechanical Properties of Biofilms by Particle-tracking Microrheology
12:58

In Situ Mapping of the Mechanical Properties of Biofilms by Particle-tracking Microrheology

Published on: December 4, 2015

Multidepth, multiparticle tracking for active microrheology using a smart camera.

Scott A Silburn1, Christopher D Saunter, John M Girkin

  • 1Centre for Advanced Instrumentation and Biophysical Sciences Institute, Department of Physics, Durham University, Durham, DH1 3LE, United Kingdom.

The Review of Scientific Instruments
|April 5, 2011
PubMed
Summary
This summary is machine-generated.

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This study introduces a novel high-speed camera and imaging technique for active microrheology. This method enables precise measurement of particle motion in optical tweezers without synchronization needs.

Area of Science:

  • Physics
  • Materials Science
  • Biophysics

Background:

  • Quantitative particle motion measurement in optical tweezers is crucial for microrheology.
  • Active microrheology probes nonlinear viscoelastic behavior in complex fluids.
  • Current methods require synchronized, independent measurements of driving force and particle response, often needing analog equipment.

Purpose of the Study:

  • To develop a specialized camera and imaging technique for high-speed video microscopy in active microrheology.
  • To eliminate the need for separate measurement systems and synchronization in these experiments.
  • To enable simultaneous optical measurement of driving motion and trapped particle response using a single instrument.

Main Methods:

  • Utilized a high-speed tracking camera based on a field-programmable gate array (FPGA) for simultaneous multi-particle tracking.

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Longitudinal Measurement of Extracellular Matrix Rigidity in 3D Tumor Models Using Particle-tracking Microrheology
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Published on: June 10, 2014

Three-dimensional Particle Tracking Velocimetry for Turbulence Applications: Case of a Jet Flow
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Three-dimensional Particle Tracking Velocimetry for Turbulence Applications: Case of a Jet Flow

Published on: February 27, 2016

Related Experiment Videos

Last Updated: Jun 3, 2026

In Situ Mapping of the Mechanical Properties of Biofilms by Particle-tracking Microrheology
12:58

In Situ Mapping of the Mechanical Properties of Biofilms by Particle-tracking Microrheology

Published on: December 4, 2015

Longitudinal Measurement of Extracellular Matrix Rigidity in 3D Tumor Models Using Particle-tracking Microrheology
11:11

Longitudinal Measurement of Extracellular Matrix Rigidity in 3D Tumor Models Using Particle-tracking Microrheology

Published on: June 10, 2014

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13:02

Three-dimensional Particle Tracking Velocimetry for Turbulence Applications: Case of a Jet Flow

Published on: February 27, 2016

  • Employed a technique to track a microsphere fixed to a driven sample chamber wall and another in an optical trap concurrently.
  • Verified the technique through active viscosity measurements on water-ethylene glycol mixtures using a phase-shift method.

    • Main Results:

    • Demonstrated simultaneous optical measurement of driving motion and trapped probe particle response with a single instrument.
    • Successfully implemented high-speed video microscopy for active microrheology without external synchronization.
    • Validated the technique's accuracy through experimental measurements on known fluid mixtures.

    Conclusions:

    • The developed specialized camera and imaging technique offer a streamlined approach to active microrheology.
    • This method simplifies experimental setups by removing the need for separate measurement systems and synchronization.
    • The technique provides a robust tool for studying complex fluids and nonlinear viscoelastic behavior.