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Title: Controlled swimming in confined fluids of magnetically actuated colloidal rotors
Author: Tierno, Pietro
Golestanian, Ramin
Pagonabarraga Mora, Ignacio
Sagués i Mestre, Francesc
Keywords: Física de partícules
Camps magnètics
Particle physics
Magnetic fields
Issue Date: 21-Nov-2008
Publisher: American Physical Society
Abstract: We show that DNA-linked anisotropic doublets composed of paramagnetic colloidal particles can be endowed with controlled propulsion when floating above a flat plate and subjected to a magnetic field precessing around an axis parallel to the plate. The propulsion mechanism for this artificial swimmer does not involve deformations, and it makes use of the minimal two degrees of freedom needed to propel it at low Reynolds numbers. We combine experimental observations with a theoretical analysis that fully characterizes the propulsion velocity in terms of the strength and frequency of the actuating magnetic field.
Note: Reproducció del document publicat a:
It is part of: Physical Review Letters, 2008, vol. 101, num. 21, p. 218304
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ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Ciència dels Materials i Química Física)
Articles publicats en revistes (Física de la Matèria Condensada)

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