Run-and-halt motility of droplets in response to light
Résumé
We show that the motion of autonomously moving oil droplets can be gated by coupling molecular photochemistry to interfacial processes. The molecular switches used here form micelles that fuel the motion of the oil droplet. A change in geometry of the micelles in response to light impacts the movement pattern of droplets, resulting in a run-and-halt behavior. As light controls the movement of the droplets, under irregular illumination conditions, motile droplets evolve positive photokinetic movement.
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