Friction Induces Anisotropic Propulsion in Sliding Magnetic Microtriangles.

ABSTRACT: 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

SUBMITTER: Junot G 

PROVIDER: S-EPMC9523709 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature