Off-axis gyration induces large-area circular motion of anisotropic microparticles in a dynamic magnetic trap

Liu，Yuan1; Lin，Gungun1; Jin，Dayong1,2

2021-07-19

10.1063/5.0056067

APPLIED PHYSICS LETTERS   影响因子和分区

0003-6951

Magnetic tweezers are crucial for single-molecule and atomic characterization and biomedical isolation of microparticle carriers. The trapping component of magnetic tweezing can be reliant on a magnetic potential well that can confine the relevant species to a localized region. Here, we report that magnetic microparticles with tailored anisotropy can transition from localized off-axis gyration to large-area locomotion in a rotating magnetic trap. The microparticles, consisting of assemblies of magnetic cores, are observed to either rotate about its structural geometric center or gyrate about one of the magnetic cores and the switching of which can be modulated by the external field. Raising the magnetic field strength above a threshold, the particles can go beyond the traditional synchronous-rotation and asynchronous-oscillation modes and into a scenario of large-area circular motion. This results in peculiar retrograde locomotion related to the magnetization maxima of the microparticle. Our finding suggests the important role of the microparticle's magnetic morphology in the controlled transport of microparticles and developing smart micro-actuators and micro-robot devices.

SCI ; EI

英语

NI论文

其他

WOS:000674420200019

20213010667127

Anisotropy ; Magnetic cores ; Magnetism ; Microrobots ; Plasma confinement

Magnetism: Basic Concepts and Phenomena:701.2 ; Electric Components and Equipment:704 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Plasma Physics:932.3

PHYSICS

2-s2.0-85110573409

Scopus

1.Institute for Biomedical Materials and Devices,Faculty of Science,University of Technology Sydney,Ultimo,2007,Australia
2.UTS-SUStech Joint Research Centre for Biomedical Materials and Devices,Department of Biomedical Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Liu，Yuan,Lin，Gungun,Jin，Dayong. Off-axis gyration induces large-area circular motion of anisotropic microparticles in a dynamic magnetic trap[J]. APPLIED PHYSICS LETTERS,2021,119(3).

Liu，Yuan,Lin，Gungun,&Jin，Dayong.(2021).Off-axis gyration induces large-area circular motion of anisotropic microparticles in a dynamic magnetic trap.APPLIED PHYSICS LETTERS,119(3).

Liu，Yuan,et al."Off-axis gyration induces large-area circular motion of anisotropic microparticles in a dynamic magnetic trap".APPLIED PHYSICS LETTERS 119.3(2021).