Event № 811

Advisors: Leshansky Alexander, Morozov Konstantin

Abstract: Controlled steering of chiral magnetic micro-/nano propellers by rotating

magnetic field is a promising technology for targeted delivery in various biomedical applications. In most of these applications magnetized chiral (helical) propellers are actuated by rotating magnetic field as they propel unidirectionally through a fluidic environment similar to a rotating corkscrew. It was shown recently that achiral magnetized objects, such as planar V-shaped motors, can propel as well. However, unidirectionality of the propulsion is not guaranteed due to the high symmetry of the problem. We study dynamics of planar V-shaped propellers actuated by a precessing magnetic fi eld provided by superimposing the dc magnetic fi eld onto the uniform rotating fi eld along the the field rotation axis. We demonstrate that the dc fi eld reduces the above symmetry and can, in fact, lead to unidirectional propulsion of planar and in-plane magnetized objects, that otherwise exhibit no net propulsion in a plane rotating field.