In the present work, we report light-induced rotation of millimeter-sized objects driven by their non-symmetric shape. The light-induced torque is originated by the thermal gradient on different sides of the teeth of star-shaped objects floating on liquid surfaces that leads to unbalanced surface tension due to the Marangoni effect. The dependence of the angular rotation on the number of teeth is demonstrated. The angular velocity is linearly dependent on the light intensity and follows a simple time behavior typical of objects moving under fluid friction. Graphic abstract: [Figure not available: see fulltext.]
Shape-driven optofluidic rotational actuation / Lucchetta, D. E.; Simoni, F.; Sheremet, N.; Reshetnyak, V.; Castagna, R.. - In: THE EUROPEAN PHYSICAL JOURNAL PLUS. - ISSN 2190-5444. - ELETTRONICO. - 136:4(2021). [10.1140/epjp/s13360-021-01365-4]
Shape-driven optofluidic rotational actuation
Lucchetta D. E.
Primo
;Simoni F.;Sheremet N.;Reshetnyak V.;Castagna R.
2021-01-01
Abstract
In the present work, we report light-induced rotation of millimeter-sized objects driven by their non-symmetric shape. The light-induced torque is originated by the thermal gradient on different sides of the teeth of star-shaped objects floating on liquid surfaces that leads to unbalanced surface tension due to the Marangoni effect. The dependence of the angular rotation on the number of teeth is demonstrated. The angular velocity is linearly dependent on the light intensity and follows a simple time behavior typical of objects moving under fluid friction. Graphic abstract: [Figure not available: see fulltext.]I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
