Marangoni effect visualized in two-dimensions Optical tweezers for gas bubbles.

ABSTRACT: In the report we demonstrate how, using laser light, effectively trap gas bubbles and transport them through a liquid phase to a desired destination by shifting the laser beam position. The physics underlying the effect is complex but quite general as it comes from the limited to two-dimension, well-known, Marangoni effect. The experimental microscope-based system consists of a thin layer of liquid placed between two glass plates containing a dye dissolved in a solvent and a laser light beam that is strongly absorbed by the dye. This point-like heat source locally changes surface tension of nearby liquid-air interface. Because of temperature gradients a photo-triggered Marangoni flows are induced leading to self-amplification of the effect and formation of large-scale whirls. The interface

SUBMITTER: Miniewicz A 

PROVIDER: S-EPMC5054428 | biostudies-literature | 2016 Oct

REPOSITORIES: biostudies-literature