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Tytuł:
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Symmetry breaking propulsion of magnetic microspheres in nonlinearly viscoelastic fluids.
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Autorzy:
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Rogowski LW; Department of Mechanical Engineering, Southern Methodist University, Dallas, TX, 75205, USA.
Ali J; Department of Chemical and Biomedical Engineering, FAMU-FSU College of Engineering, Tallahassee, FL, 32310, USA.
Zhang X; Department of Mechanical Engineering, Southern Methodist University, Dallas, TX, 75205, USA.
Wilking JN; Department of Chemical and Biological Engineering, Montana State University, Bozeman, MT, 59717, USA.
Fu HC; Department of Mechanical Engineering, The University of Utah, Salt Lake City, UT, 84112, USA. .
Kim MJ; Department of Mechanical Engineering, Southern Methodist University, Dallas, TX, 75205, USA. .
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Źródło:
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Nature communications [Nat Commun] 2021 Feb 18; Vol. 12 (1), pp. 1116. Date of Electronic Publication: 2021 Feb 18.
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Typ publikacji:
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Journal Article; Research Support, N.I.H., Extramural; Research Support, U.S. Gov't, Non-P.H.S.
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Język:
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English
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Imprint Name(s):
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Original Publication: [London] : Nature Pub. Group
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MeSH Terms:
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Elasticity*
Magnetic Phenomena*
Microspheres*
Nonlinear Dynamics*
Acrylic Resins/chemistry ; Humans ; Mucins/chemistry ; Mucins/ultrastructure ; Rheology ; Viscosity
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References:
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Grant Information:
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R01 GM131408 United States GM NIGMS NIH HHS
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Substance Nomenclature:
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0 (Acrylic Resins)
0 (Mucins)
9003-05-8 (polyacrylamide)
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Entry Date(s):
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Date Created: 20210219 Date Completed: 20210402 Latest Revision: 20210521
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Update Code:
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20240105
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PubMed Central ID:
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PMC7893017
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DOI:
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10.1038/s41467-021-21322-0
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PMID:
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33602911
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Microscale propulsion impacts a diverse array of fields ranging from biology and ecology to health applications, such as infection, fertility, drug delivery, and microsurgery. However, propulsion in such viscous drag-dominated fluid environments is highly constrained, with time-reversal and geometric symmetries ruling out entire classes of propulsion. Here, we report the spontaneous symmetry-breaking propulsion of rotating spherical microparticles within non-Newtonian fluids. While symmetry analysis suggests that propulsion is not possible along the fore-aft directions, we demonstrate the existence of two equal and opposite propulsion states along the sphere's rotation axis. We propose and experimentally corroborate a propulsion mechanism for these spherical microparticles, the simplest microswimmers to date, arising from nonlinear viscoelastic effects in rotating flows similar to the rod-climbing effect. Similar possibilities of spontaneous symmetry-breaking could be used to circumvent other restrictions on propulsion, revising notions of microrobotic design and control, drug delivery, microscale pumping, and locomotion of microorganisms.