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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/195176
Friction induces anisotropic propulsion in sliding magnetic microtriangles
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In viscous fluids, motile microentities such as bacteria or artificial swimmers often display different transport modes than macroscopic ones. A current challenge in the field aims at using friction asymmetry to steer the motion of microscopic particles. Here we show that lithographically shaped magnetic microtriangles undergo a series of complex transport modes when driven by a precessing magnetic field, including a surfing-like drift close to the bottom plane. In this regime, we exploit the triangle asymmetric shape to obtain a transversal drift which is later used to transport the microtriangle in any direction along the plane. We explain this friction-induced anisotropic sliding with a minimal numerical model capable to reproduce the experimental results. Due to the flexibility offered by soft-lithographic sculpturing, our method to guide anisotropic-shaped magnetic microcomposites can be potentially extended to many other field responsive structures operating in fluid media.
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JUNOT, Gaspard, LEYVA, Sergi g., PAUER, Christoph, CALERO BORRALLO, Carles, PAGONABARRAGA MORA, Ignacio, LIEDL, Tim, TAVACOLI, Joe, TIERNO, Pietro. Friction induces anisotropic propulsion in sliding magnetic microtriangles. _Nano Letters_. 2022. Vol. 22, núm. 7408-7414. [consulta: 7 de febrer de 2026]. ISSN: 1530-6984. [Disponible a: https://hdl.handle.net/2445/195176]