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Title:
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Colloidal Microworms Propelling via a Cooperative Hydrodynamic Conveyor Belt
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Author:
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Martinez-Pedrero, Fernando; Ortiz-Ambriz, Antonio; Pagonabarraga Mora, Ignacio; Tierno, Pietro
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Other authors:
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Universitat de Barcelona |
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Abstract:
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We study propulsion arising from microscopic colloidal rotors dynamically assembled and driven in a viscous fluid upon application of an elliptically polarized rotating magnetic field. Close to a confining plate, the motion of this self-assembled microscopic worm results from the cooperative flow generated by the spinning particles which act as a hydrodynamic 'conveyor belt.' Chains of rotors propel faster than individual ones, until reaching a saturation speed at distances where induced-flow additivity vanishes. By combining experiments and theoretical arguments, we elucidate the mechanism of motion and fully characterize the propulsion speed in terms of the field parameters. |
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Subject(s):
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-Col·loides
-Nanotecnologia
-Colloids
-Nanotechnology |
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Rights:
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(c) American Physical Society, 2015
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Document type:
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Article
Article - Published version |
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Published by:
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American Physical Society
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