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Active boundary layers in confined active nematics [PDF]
Nature Communications, 2022 The boundary of conventional liquid crystals is known to anchor the orientational field of the passive materials under equilibrium conditions. Here, the authors show an active nematic to develop active boundary layers that topologically polarize the ...
Jerôme Hardoüin +5 more
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Mesoscopic theory for fluctuating active nematics [PDF]
New Journal of Physics, 2013 The term active nematics designates systems in which apolar elongated particles spend energy to move randomly along their axis and interact by inelastic collisions in the presence of noise.
Eric Bertin +5 more
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Nature Communications, 2018 Active matter systems are made up of self-driven components which extract energy from their surroundings to generate mechanical work. Here the authors review the subfield of active nematics and provide a comparison between theoretical findings and the ...
Amin Doostmohammadi +3 more
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Self-organized dynamics and the transition to turbulence of confined active nematics. [PDF]
Proc Natl Acad Sci U S A, 2019 We study how confinement transforms the chaotic dynamics of bulk microtubule-based active nematics into regular spatiotemporal patterns. For weak confinements, multiple continuously nucleating and annihilating topological defects self-organize into ...
Opathalage A +6 more
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Emergence of active nematics in chaining bacterial biofilms [PDF]
Nature Communications, 2019 Active nematics consist of elongated self-driven units and can emerge in bacterial systems. Here the authors investigate such emergence in a growing bacterial biofilm and demonstrate that localized stress and mechanical instabilities drive the formation ...
Yusuf Ilker Yaman +3 more
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Onset of meso-scale turbulence in active nematics [PDF]
Nature Communications, 2017 Bacteria continuously inject energy into their surroundings and thus induce chaotic like flows, namely meso-scale turbulence. Here, the authors show that transition to meso-scale turbulence and inertial turbulence observed in pipes share the same scaling
Amin Doostmohammadi +3 more
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Curvature controlled defect dynamics in topological active nematics [PDF]
Scientific Reports, 2017 We study the spatiotemporal patterns that emerge when an active nematic film is topologically constraint. These topological constraints allow to control the non-equilibrium dynamics of the active system.
Francesco Alaimo +2 more
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Energetic Variational Modeling of Active Nematics: Coupling the Toner–Tu Model with ATP Hydrolysis [PDF]
EntropyWe present a thermodynamically consistent energetic variational model for active nematics driven by ATP hydrolysis. Extending the classical Toner–Tu framework, we introduce a chemo-mechanical coupling mechanism in which the self-advection and ...
Yiwei Wang
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Active Nematics Reinforce the Ratchet Flow in Dense Environments Without Jamming [PDF]
Advanced ScienceThe past decade witnessed a surge in discoveries where biological systems, such as bacteria or living cells, inherently portray active polar or nematic behavior: they prefer to align with each other and form local order during migration.
Yisong Yao +5 more
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Integer topological defects offer a methodology to quantify and classify active cell monolayers [PDF]
Nature CommunicationsMonolayers of confluent elongated cells are frequently considered active nematics, featuring $$\pm \frac{1}{2}$$ ± 1 2 topological defects. In extensile systems, where cells extend further along their long axis, they can accumulate at $$+\frac{1}{2 ...
Zihui Zhao +7 more
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