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Title: Topological structure and dynamics of three-dimensional active nematics

Journal Article · · Science
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Topological structures are effective descriptors of the nonequilibrium dynamics of diverse many-body systems. For example, motile, point-like topological defects capture the salient features of two-dimensional active liquid crystals composed of energy-consuming anisotropic units. We dispersed force-generating microtubule bundles in a passive colloidal liquid crystal to form a three-dimensional active nematic. Light-sheet microscopy revealed the temporal evolution of the millimeter-scale structure of these active nematics with single-bundle resolution. The primary topological excitations are extended, charge-neutral disclination loops that undergo complex dynamics and recombination events. Our work suggests a framework for analyzing the nonequilibrium dynamics of bulk anisotropic systems as diverse as driven complex fluids, active metamaterials, biological tissues, and collections of robots or organisms.

Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0019733
OSTI ID:
1603221
Journal Information:
Science, Journal Name: Science Journal Issue: 6482 Vol. 367; ISSN 0036-8075
Publisher:
American Association for the Advancement of Science (AAAS)Copyright Statement
Country of Publication:
United States
Language:
English

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Defect dynamics in active nematics
  • Giomi, Luca; Bowick, Mark J.; Mishra, Prashant
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 372, Issue 2029 https://doi.org/10.1098/rsta.2013.0365
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