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2019-04-23

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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/143262

Leap-frog transport of magnetically driven anisotropic colloidal rotors

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Recurs relacionat

https://doi.org/10.1063/1.5086280

Resum

In this article, we combine experiments and theory to investigate the transport properties of anisotropic hematite colloidal rotors that dynamically assemble into translating clusters upon application of a rotating magnetic field. The applied field exerts a torque to the particles forcing rotation close to a surface and thus a net translational motion at a frequency tunable speed. When approaching, pairs of particles are observed to assemble into stable three-dimensional clusters that perform a periodic leap-frog type dynamics and propel at a faster speed. We analyze the cluster formation and its lifetime and investigate the role of particle shape in the propulsion speed and stability. We show that the dynamics of the system results from a delicate balance between magnetic dipolar interactions and hydrodynamics, and we introduce a theoretical model that qualitatively explains the observed phenomena.

Matèries

Electromagnetisme, Hidrodinàmica

Matèries (anglès)

Electromagnetism, Hydrodynamics

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Articles publicats en revistes (Física de la Matèria Condensada)
<b>Publicacions de projectes de recerca finançats per la UE</b>

Citació

MASSANA-CID, Helena, et al. Leap-frog transport of magnetically driven anisotropic colloidal rotors. Journal of Chemical Physics. 2019. Vol. 150, num. 164901. ISSN 0021-9606. [consulted: 16 of May of 2026]. Available at: https://hdl.handle.net/2445/143262

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