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dc.contributor.authorRogowski, Louis William
dc.contributor.authorAli, Jamel
dc.contributor.authorZhang, Xiao
dc.contributor.authorWilking, James N.
dc.contributor.authorFu, Henry C.
dc.contributor.authorKim, Min Jun
dc.identifier.citationRogowski, L.W., Ali, J., Zhang, X. et al. Symmetry breaking propulsion of magnetic microspheres in nonlinearly viscoelastic fluids. Nat Commun 12, 1116 (2021).
dc.description.abstractMicroscale 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.en_US
dc.publisherSpringer Natureen_US
dc.titleSymmetry breaking propulsion of magnetic microspheres in nonlinearly viscoelastic fluidsen_US
mus.citation.journaltitleNature Communicationsen_US
mus.relation.collegeCollege of Engineeringen_US
mus.relation.departmentCenter for Biofilm Engineering.en_US
mus.relation.departmentChemical & Biological Engineering.en_US
mus.relation.departmentMechanical & Industrial Engineering.en_US
mus.relation.universityMontana State University - Bozemanen_US

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