4.5 Article

Aqueous droplet manipulation by optically induced Marangoni circulation

Journal

MICROFLUIDICS AND NANOFLUIDICS
Volume 11, Issue 3, Pages 307-316

Publisher

SPRINGER HEIDELBERG
DOI: 10.1007/s10404-011-0797-2

Keywords

Marangoni force; Thermocapillary flow; Droplet manipulation

Funding

  1. National Science Foundation [EEC09-26632]
  2. Directorate For Engineering
  3. Div Of Electrical, Commun & Cyber Sys [0926632] Funding Source: National Science Foundation

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The manipulation of picoliter droplets is demonstrated using optically induced microscale circulatory flows. The circulation results from Marangoni effects induced by optical heating from light patterns created by a computer projector. Manipulation of single droplets and parallel manipulation of multiple droplets are achieved with induced forces of up to 1 nN and an average resolution of 146.5 mu m.

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