GIROT, A.; DANNÉ, N.; WÜRGER, Alois; BICKEL, Thomas; REN, Kuan Fang; LOUDET, J. C.; POULIGNY, B.

doi:10.1021/acs.langmuir.6b00181

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GIROT, A.
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
Centre de Recherche Paul Pascal [CRPP]

DANNÉ, N.
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
Centre de Recherche Paul Pascal [CRPP]

WÜRGER, Alois
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

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Article de revue

Ce document a été publié dans

Langmuir. 2016-03-22, vol. 32, n° 11, p. 2687 - 2697

American Chemical Society

Résumé en anglais

A micrometer-sized spherical particle classically equilibrates at the water?air interface in partial wetting configuration, causing about no deformation to the interface. In condition of thermal equilibrium, the particle just undergoes faint Brownian motion, well visible under a microscope. We report experimental observations when the particle is made of a light-absorbing material and is heated up by a vertical laser beam. We show that, at small laser power, the particle is trapped in on-axis configuration, similarly to 2-dimensional trapping of a transparent sphere by optical forces. Conversely, on-axis trapping becomes unstable at higher power. The particle escapes off the laser axis and starts orbiting around the axis. We show that the laser-heated particle behaves as a microswimmer with velocities on the order of several 100 ?m/s with just a few milliwatts of laser power.< Réduire

DOI

http://dx.doi.org/10.1021/acs.langmuir.6b00181

Project ANR

Méthodes avancées pour la caractérisation optique de systèmes particulaires complexes - ANR-13-BS09-0008
Effets thermoélectriques à l'échelle nano - ANR-13-IS04-0003

Origine

Importé de hal

Unités de recherche

Laboratoire Ondes et Matière d'Aquitaine (LOMA) - UMR 5798