Dietrich, K;
Jaensson, N;
Buttinoni, I;
Volpe, G;
Isa, L;
(2020)
Microscale Marangoni Surfers.
Physical Review Letters
, 125
(9)
, Article 098001. 10.1103/PhysRevLett.125.098001.
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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.
| Type: | Article |
|---|---|
| Title: | Microscale Marangoni Surfers |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.125.098001 |
| Publisher version: | https://doi.org/10.1103/PhysRevLett.125.098001 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher's terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10109786 |
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