Physics of Fluids • Vol 37 • No 1
Torque-driven superparamagnetic microbots
January 2025 • Konstantin I. Morozov, Dana Zusmanovich, Boris Rubinstein, Alexander M. Leshansky
Actuation powered by a rotating magnetic field is a promising method of controlled steering of micro(nano)metric synthetic propellers through fluids. Such actuation relies on a magnetic torque, which is a product of the driving field and a dipolar magnetic moment possessed by the micro-/nanopropeller of nontrivial shape allowing for rotation–translation coupling. While ferromagnetic (permanently magnetized) microbots have been studied extensively, superparamagnetic (susceptible to magnetization, not possessing rem…