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Magnetic nanohelices swimming in an optical bowl

TitleMagnetic nanohelices swimming in an optical bowl
Publication TypeJournal Article
Year of Publication2021
AuthorsPatil, G, Vashist, E, Kakoty, H, Behera, J, Ghosh, A
JournalApplied Physics Letters

Magnetically driven helical nanoswimmers can impact many problems related to biology and medicine, such as intracellular manipulation, microsurgery, and drug delivery, and provide a promising platform for simulating and studying the physics of active matter. Crucial aspects of studying this powerful system pertain to their motion and dynamics under different physical conditions. In this paper, we demonstrate the confinement and controlled manipulation of magnetic nanohelices within an optical bowl formed by a defocused optical tweezer. The interaction of helical swimmers with the optical confinement was modeled and further confirmed by experiments. The results suggest that the combination of optical and magnetic forces can offer interesting avenues in the study of magnetic nanoswimmers, especially those related to micro-rheology and hydrodynamics.