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Plasmonic Trapping and Release of Nanoparticles in a Monitoring Environment
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Sorting nanoparticles with intertwined plasmonic and thermo-hydrodynamical forces.

A Cuche1, A Canaguier-Durand, E Devaux

  • 1ISIS & icFRC, University of Strasbourg and CNRS (UMR 7006) , 8 allée Gaspard Monge, 67000 Strasbourg, France.

Nano Letters
|August 10, 2013
PubMed
Summary

This study sorts gold nanoparticles using plasmonic and thermo-hydrodynamical forces in microfluidics. Brownian motion analysis confirms theoretical optical force calculations, highlighting thermal and hydrodynamic effects for sorting.

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Area of Science:

  • Nanotechnology
  • Microfluidics
  • Physical Chemistry

Background:

  • Microfluidic devices offer precise control over small volumes.
  • Plasmonic forces are increasingly utilized for nanoparticle manipulation.
  • Understanding nanoparticle dynamics is crucial for advanced sorting techniques.

Purpose of the Study:

  • To investigate the sorting of gold nanoparticles in a microfluidic environment.
  • To analyze the interplay of plasmonic, thermal, and hydrodynamical forces.
  • To validate theoretical models with experimental observations.

Main Methods:

  • Utilizing microfluidic systems for nanoparticle manipulation.
  • Employing plasmonic and thermo-hydrodynamical forces for sorting.
  • Conducting Brownian statistical analysis of nanoparticle kinetic motions.

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  • Comparing experimental data with Mie-type theoretical evaluations.

    • Main Results:

    • Successful sorting of gold nanoparticles was achieved.
    • Experimental data align well with theoretical predictions of optical forces.
    • Demonstrated the significant role of thermal and hydrodynamical effects in the sorting process.

    Conclusions:

    • Plasmonic and thermo-hydrodynamical forces are effective for gold nanoparticle sorting in microfluidics.
    • Mie-type theory accurately describes optical forces in the plasmonic near field.
    • Thermal and hydrodynamical effects are critical considerations for optimizing microfluidic sorting.