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Self-regulating photochemical Rayleigh-Bénard convection using a highly-absorbing organic photoswitch

Author

Listed:
  • Serena Seshadri

    (University of California Santa Barbara)

  • Luke F. Gockowski

    (University of California Santa Barbara)

  • Jaejun Lee

    (University of California Santa Barbara
    University of California Santa Barbara)

  • Miranda Sroda

    (University of California Santa Barbara)

  • Matthew E. Helgeson

    (University of California Santa Barbara)

  • Javier Read de Alaniz

    (University of California Santa Barbara)

  • Megan T. Valentine

    (University of California Santa Barbara)

Abstract

We identify unique features of a highly-absorbing negatively photochromic molecular switch, donor acceptor Stenhouse adduct (DASA), that enable its use for self-regulating light-activated control of fluid flow. Leveraging features of DASA’s chemical properties and solvent-dependent reaction kinetics, we demonstrate its use for photo-controlled Rayleigh-Bénard convection to generate dynamic, self-regulating flows with unparalleled fluid velocities (~mm s−1) simply by illuminating the fluid with visible light. The exceptional absorbance of DASAs in solution, uniquely controllable reaction kinetics and resulting spatially-confined photothermal flows demonstrate the ways in which photoswitches present exciting opportunities for their use in optofluidics applications requiring tunable flow behavior.

Suggested Citation

  • Serena Seshadri & Luke F. Gockowski & Jaejun Lee & Miranda Sroda & Matthew E. Helgeson & Javier Read de Alaniz & Megan T. Valentine, 2020. "Self-regulating photochemical Rayleigh-Bénard convection using a highly-absorbing organic photoswitch," Nature Communications, Nature, vol. 11(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-16277-7
    DOI: 10.1038/s41467-020-16277-7
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