Topological structure and dynamics of three-dimensional active nematics.
Topological structure and dynamics of three-dimensional active nematics.
复制标题
三维主动神灵的拓扑结构和动力学。
DOI:
10.1126/science.aaz4547
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发表时间:
2020-03-06
期刊:
影响因子:
--
通讯作者:
Dogic Z
中科院分区:
文献类型:
--
作者:
Duclos G;Adkins R;Banerjee D;Peterson MSE;Varghese M;Kolvin I;Baskaran A;Pelcovits RA;Powers TR;Baskaran A;Toschi F;Hagan MF;Streichan SJ;Vitelli V;Beller DA;Dogic Z
Topological structures are effective descriptors of the non-equilibrium 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 disperse force-generating microtubule bundles in a passive colloidal liquid crystal to form a three-dimensional active nematics. Light-sheet microscopy reveals 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 non-equilibrium dynamics of bulk anisotropic systems as diverse as driven complex fluids, active metamaterials, biological tissues and collections of robots or organisms. Light sheet microscopy reveals the chaotic behavior of topologically neutral disclination loops in active nematics.
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