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

Liu, Y; Lin, G; Jin, D

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

Liu, Y Lin, G

Jin, D

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Publisher:: AMER INST PHYSICS
Publication Type:: Journal Article
Citation:: Applied Physics Letters, 2021, 119, (3)
Issue Date:: 2021-07-19

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Field	Value	Language
dc.contributor.author	Liu, Y
dc.contributor.author	Lin, G https://orcid.org/0000-0001-9880-8478
dc.contributor.author	Jin, D https://orcid.org/0000-0003-1046-2666
dc.date.accessioned	2021-08-08T03:52:03Z
dc.date.available	2021-08-08T03:52:03Z
dc.date.issued	2021-07-19
dc.identifier.citation	Applied Physics Letters, 2021, 119, (3)
dc.identifier.issn	0003-6951
dc.identifier.issn	1077-3118
dc.identifier.uri	http://hdl.handle.net/10453/150069
dc.description.abstract	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.
dc.language	English
dc.publisher	AMER INST PHYSICS
dc.relation	http://purl.org/au-research/grants/arc/IH150100028
dc.relation.ispartof	Applied Physics Letters
dc.relation.isbasedon	10.1063/5.0056067
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.subject	02 Physical Sciences, 09 Engineering, 10 Technology
dc.subject.classification	Applied Physics
dc.title	Off-axis gyration induces large-area circular motion of anisotropic microparticles in a dynamic magnetic trap
dc.type	Journal Article
utslib.citation.volume	119
utslib.for	02 Physical Sciences
utslib.for	09 Engineering
utslib.for	10 Technology
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
pubs.organisational-group	/University of Technology Sydney/Strength - IBMD - Initiative for Biomedical Devices
utslib.copyright.status	open_access	*
utslib.copyright.embargo	2022-07-19T00:00:00+1000Z
dc.date.updated	2021-08-08T03:52:02Z
pubs.issue	3
pubs.publication-status	Published
pubs.volume	119
utslib.citation.issue	3

Abstract:

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.

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http://hdl.handle.net/10453/150069