Skip to main content
Dryad logo

Janus microdimer swimming in oscillating magnetic field

Citation

Yang, Jinyou (2020), Janus microdimer swimming in oscillating magnetic field, Dryad, Dataset, https://doi.org/10.5061/dryad.p8cz8w9m7

Abstract

Artificial microswimmers powered by magnetic fields have numerous applications, such as drug delivery, biosensing for minimally invasive medicine and environmental remediation. Recently, a Janus microdimer surface walker that can be propelled by an oscillating magnetic field near a surface was reported by Li et al.[2018]. To clarify the mechanism for the surface walker, we numerically studied in detail a Janus microdimer swimming near a wall actuated by an oscillating magnetic field. The results showed that a Janus microdimer in an oscillating magnetic field can produce magnetic torque in the y-direction, which eventually propels the Janus microdimer along the x-direction near a wall. Furthermore, we found that the Janus microdimer can also move along a special direction in an oscillating magnetic field with two orientations without a wall. The knowledge obtained in this study is fundamental for understanding the interactions between a Janus microdimer and surfaces in an oscillating magnetic field and is useful for controlling Janus microdimer motion with or without a wall.