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Related Experiment Videos

Marangoni forces created by surface plasmon decay.

R H Farahi1, A Passian, T L Ferrell

  • 1Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA. farahirh@ornl.gov

Optics Letters
|March 29, 2005
PubMed
Summary
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We demonstrate optical microfluidic manipulation of fluids using surface plasmon deexcitation. This method utilizes thermal gradients from decaying surface plasmons to control fluid flow, offering new possibilities in microfluidics.

Area of Science:

  • Optics
  • Microfluidics
  • Materials Science

Background:

  • Microfluidic manipulation often relies on external forces.
  • Surface plasmons offer unique energy transfer mechanisms.

Purpose of the Study:

  • To present optical microfluidic manipulation of silicone oil and glycerol.
  • To utilize surface plasmon deexcitation energy for fluid actuation.

Main Methods:

  • Optical excitation of surface plasmons in a thin gold foil.
  • Generating thermal gradients via phonon energy from plasmon decay.
  • Actuating fluid flows (silicone oil, glycerol) using surface tension driven forces.

Main Results:

  • Demonstrated optical microfluidic manipulation via surface tension driven forces.

Related Experiment Videos

  • Established a link between surface plasmon deexcitation energy and fluid flow.
  • Showcased spectral dependence of plasmon decay length for control.

    • Conclusions:

    • Optical microfluidics can be achieved using surface plasmon deexcitation energy.
    • Thermal gradients are effectively generated for fluid actuation.
    • Control over optical beam characteristics allows for advanced manipulation.