Janus microdimer swimming in an oscillating magnetic field.

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. (Adv. Funct. Mater.28, 1706066. (doi:10.1002/adfm.201706066)). 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.

journal_name

R Soc Open Sci

authors

Yang J

doi

10.1098/rsos.200378

subject

Has Abstract

pub_date

2020-12-09 00:00:00

pages

200378

issue

12

issn

2054-5703

pii

rsos200378

journal_volume

7

pub_type

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