Visualization of manipulation force field for micro-fluidic droplet by photothermal interfacial flow

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Abstract

We present a noncontact, selective and flexible manipulation for picoliter droplets. This can be achieved by photothermal Marangoni activation of liquid-liquid interface due to a local temperature gradient given by the irradiation of heating light. Since the manipulation force for a droplet depends on the droplet size, interfacial tension and temperature gradient around the droplet, in this study, we have quantified the temperature field around droplets under patterned light heating based on laser-induced fluorescence. From this, we enabled to not only obtain the manipulation force field for droplet by photothermal Marangoni effect, but also predict the direction of the manipulation force for droplet.

Original languageEnglish
Title of host publication18th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2014
PublisherChemical and Biological Microsystems Society
Pages1659-1661
Number of pages3
ISBN (Electronic)9780979806476
Publication statusPublished - 1 Jan 2014
Event18th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2014 - San Antonio, United States
Duration: 26 Oct 201430 Oct 2014

Publication series

Name18th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2014

Conference

Conference18th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2014
CountryUnited States
CitySan Antonio
Period26/10/1430/10/14

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Keywords

  • Droplet microfluidics
  • Laser-induced fluorescence
  • Photothermal Marangoni effect

Cite this

Muto, M., & Motosuke, M. (2014). Visualization of manipulation force field for micro-fluidic droplet by photothermal interfacial flow. In 18th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2014 (pp. 1659-1661). (18th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2014). Chemical and Biological Microsystems Society.