Light-driven boats using asymmetrical convection flow

Self-propelled microrobots have been attracting much attention. In this study, we report that a light-driven boat using asymmetrical convection flow moves toward the colder end. Specifically, we demonstrated that a floating circular structure consisting of a light-reflecting semi-circular part and a light-absorbing semi-circular part moves toward the end of the light-reflecting part under light irradiation. In addition, by visualizing the flow field under the boat, we confirmed that the boat generated a convection flow toward the cold side and was moving to ride on the flow. Our device is useful for biomedical applications and water remediation. Published under an exclusive license by AIP Publishing.

Automated summary

Researchers report a light-driven boat that moves towards the colder end through asymmetrical convection flow. They demonstrate that a floating circular structure consisting of light-reflecting and light-absorbing parts moves towards the light-reflecting end under light irradiation. The device is useful for biomedical applications and water remediation.