title: Control over Janus micromotors by the strength of a magnetic field.
abstract: For transportation of molecules or biological cells using artificial motors, the control over their motion, i.e. direction and speed of transfer, is important. Here, we demonstrate that modification of the velocity and orientation of a magnetic Janus particle can be efficiently controlled by tuning the strength of an applied homogeneous magnetic field. Interestingly, by keeping the same orientation of the magnetic field but changing its magnitude not only the velocity of capped particles can be altered but even their direction of motion can be reversed. We put forth a simple qualitative model, which allows us to explain this intriguing observation.
authors.affiliation: Max Bergmann Center of Biomaterials, Dresden University of Technology, Budapester Str. 27, D-01069 Dresden, Germany. larysa.baraban@nano.tu-dresden.de
authors.forename: Larysa
authors.initials: L
authors.lastname: Baraban
authors.forename: Denys
authors.initials: D
authors.lastname: Makarov
authors.forename: Oliver G
authors.initials: OG
authors.lastname: Schmidt
authors.forename: Gianaurelio
authors.initials: G
authors.lastname: Cuniberti
authors.forename: Paul
authors.initials: P
authors.lastname: Leiderer
authors.forename: Artur
authors.initials: A
authors.lastname: Erbe
mesh_terms: D003198:Computer Simulation; D005246:Feedback; D060526:Magnetic Fields; D008904:Miniaturization; D008962:Models, Theoretical; D009038:Motion; D053758:Nanoparticles / Q000737:chemistry* / Q000528:radiation effects*; D013314:Stress, Mechanical; D014159:Transducers