Artificial Flagella from Magneto-Elastic Filaments
J. Bibette (Paris) and H.A. Stone (DEAS)
Spherical paramagnetic particles, with diameters from tens to hundreds of nanometers, can be linked together to form a chain, which can be aligned with a uniform magnetic field, and further manipulated to swim using a time-varying orthogonal magnetic field. Attaching the chain to a cell thus enables swimming of the cell as shown in the series of images at the top. Numerical simulations, shown in the second figure above, allow detailed exploration of the swimming behavior and identification of optimum swimming conditions.