Actions for Fission and fusion scenarios for magnetic microswimmer clusters [electronic resource].

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Fission and fusion scenarios for magnetic microswimmer clusters [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy. Office of Basic Energy Sciences, 2016.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Additional Creators
Argonne National Laboratory, United States. Department of Energy. Office of Basic Energy Sciences, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Fission and fusion processes of particle clusters occur in many areas of physics and chemistry from subnuclear to astronomic length scales. Here we study fission and fusion of magnetic microswimmer clusters as governed by their hydrodynamic and dipolar interactions. Rich scenarios are found that depend crucially on whether the swimmer is a pusher or a puller. In particular a linear magnetic chain of pullers is stable while a pusher chain shows a cascade of fission (or disassembly) processes as the self-propulsion velocity is increased. Contrarily, magnetic ring clusters show fission for any type of swimmer. Moreover, we find a plethora of possible fusion (or assembly) scenarios if a single swimmer collides with a ringlike cluster and two rings spontaneously collide. Lastly, our predictions are obtained by computer simulations and verifiable in experiments on active colloidal Janus particles and magnetotactic bacteria.
Report Numbers
E 1.99:1336247
Subject(s)
Note
Published through SciTech Connect.
11/22/2016.
"132344"
Nature Communications 7 13519 ISSN 2041-1723 AM
Francisca Guzmán-Lastra; Andreas Kaiser; Hartmut Löwen.
Deutsche Forschungsgemeinschaft (DFG)
Funding Information
AC02-06CH11357
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