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Date
2020-08-25Type
- Journal Article
Abstract
We apply laser light to induce the asymmetric heating of Janus colloids adsorbed at water-oil interfaces and realize active micrometric "Marangoni surfers." The coupling of temperature and surfactant concentration gradients generates Marangoni stresses leading to self-propulsion. Particle velocities span 4 orders of magnitude, from microns/s to cm/s, depending on laser power and surfactant concentration. Experiments are rationalized by finite elements simulations, defining different propulsion regimes relative to the magnitude of the thermal and solutal Marangoni stress components. Show more
Publication status
publishedExternal links
Journal / series
Physical Review LettersVolume
Pages / Article No.
Publisher
American Physical SocietyOrganisational unit
09455 - Isa, Lucio / Isa, Lucio
09482 - Vermant, Jan / Vermant, Jan
Funding
812780 - Active Matter: From Fundamental Science to Technological Applications (EC)
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