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Understanding and controlling plasmon-induced convection

Author

Listed:
  • Brian J. Roxworthy

    (University of Illinois at Urbana-Champaign)

  • Abdul M. Bhuiya

    (University of Illinois at Urbana-Champaign)

  • Surya P. Vanka

    (University of Illinois at Urbana-Champaign)

  • Kimani C. Toussaint

    (University of Illinois at Urbana-Champaign)

Abstract

The heat generation and fluid convection induced by plasmonic nanostructures is attractive for optofluidic applications. However, previously published theoretical studies predict only nanometre per second fluid velocities that are inadequate for microscale mass transport. Here we show both theoretically and experimentally that an array of plasmonic nanoantennas coupled to an optically absorptive indium-tin-oxide (ITO) substrate can generate >micrometre per second fluid convection. Crucially, the ITO distributes thermal energy created by the nanoantennas generating an order of magnitude increase in convection velocities compared with nanoantennas on a SiO2 base layer. In addition, the plasmonic array alters absorption in the ITO, causing a deviation from Beer–Lambert absorption that results in an optimum ITO thickness for a given system. This work elucidates the role of convection in plasmonic optical trapping and particle assembly, and opens up new avenues for controlling fluid and mass transport on the micro- and nanoscale.

Suggested Citation

  • Brian J. Roxworthy & Abdul M. Bhuiya & Surya P. Vanka & Kimani C. Toussaint, 2014. "Understanding and controlling plasmon-induced convection," Nature Communications, Nature, vol. 5(1), pages 1-8, May.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4173
    DOI: 10.1038/ncomms4173
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    Cited by:

    1. Céline Molinaro & Maëlle Bénéfice & Aurore Gorlas & Violette Cunha & Hadrien M. L. Robert & Ryan Catchpole & Laurent Gallais & Patrick Forterre & Guillaume Baffou, 2022. "Life at high temperature observed in vitro upon laser heating of gold nanoparticles," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    2. Chuchuan Hong & Justus C. Ndukaife, 2023. "Scalable trapping of single nanosized extracellular vesicles using plasmonics," Nature Communications, Nature, vol. 14(1), pages 1-8, December.

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