Results 61 to 70 of about 4,695,040 (225)
Multiscale Microtubule Dynamics in Active Nematics [PDF]
Physical Review Letters, 2021 In microtubule-based active nematics, motor-driven extensile motion of microtubule bundles powers chaotic large-scale dynamics. We quantify the interfilament sliding motion both in isolated bundles and in a dense active nematic. The extension speed of an isolated microtubule pair is comparable to the molecular motor stepping speed. In contrast, the net
Linnea M. Lemma +7 more
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Phase ordering in binary mixtures of active nematic fluids. [PDF]
Physical Review EWe use a continuum, two-fluid approach to study a mixture of two active nematic fluids. Even in the absence of thermodynamically driven ordering, for mixtures of different activities we observe turbulent microphase separation, where domains form and ...
S. Bhattacharyya, J. Yeomans
semanticscholar +1 more source
Role of Advective Inertia in Active Nematic Turbulence. [PDF]
Physical Review Letters, 2021 Suspensions of active agents with nematic interactions exhibit complex spatiotemporal dynamics such as mesoscale turbulence. Since the Reynolds number of microscopic flows is very small on the scale of individual agents, inertial effects are typically ...
Colin-Marius Koch, M. Wilczek
semanticscholar +1 more source
Active Self-Organization of Actin-Microtubule Composite Self-Propelled Rods
Frontiers in Physics, 2018 Spontaneous self-organization of active matter has been demonstrated in a number of biological systems including bacteria, cells, and cytoskeletal filaments.
Leila Farhadi +4 more
doaj +1 more source
Фізика і хімія твердого тіла, 2021 The paper presents the results of the study of the parameters of the highly sensitive active medium of the NO2 sensor based on a cholesterol-nematic mixture with an admixture of carbon nanotubes.
Z.M. Mykytyuk +3 more
doaj +1 more source
Fractal generation in a two-dimensional active-nematic fluid. [PDF]
Chaos, 2021 Active fluids, composed of individual self-propelled agents, can generate complex large-scale coherent flows. A particularly important laboratory realization of such an active fluid is a system composed of microtubules, aligned in a quasi-two-dimensional
K. Mitchell +3 more
semanticscholar +1 more source
Velocity Correlations in an Active Nematic [PDF]
Physical Review Letters, 2013 The flow properties of a continuum model for an active nematic is studied and compared with recent experiments on suspensions of microtubule bundles and molecular motors. The velocity correlation length is found to be independent of the strength of the activity while the characteristic velocity scale increases monotonically as the activity is increased,
Sumesh P. Thampi +2 more
openaire +4 more sources
Engineering Chiroptical Interactions through Integrating Plasmonic Arrays with Cholesteric Nanocellulose. [PDF]
Adv MaterIn this study, we demonstrate how the combination of plant‐based cellulose and gold nanoparticle lines produces robust, tunable chiral light control in composite films. The resulting plasmonic cellulose composite exhibits a strong plasmonic CD at the surface lattice resonance, along with an inversion of chiroptical response upon reversing the ...
Tao H +9 more
europepmc +2 more sources
Excitable Patterns in Active Nematics
Physical Review Letters, 2011 We analyze a model of mutually-propelled filaments suspended in a two-dimensional solvent. The system undergoes a mean-field isotropic-nematic transition for large enough filament concentrations and the nematic order parameter is allowed to vary in space and time.
Giomi, Luca +3 more
openaire +5 more sources
Self-propulsive active nematics. [PDF]
Philos Trans A Math Phys Eng SciIncreasing evidence suggests that active matter exhibits instances of mixed symmetry that cannot be fully described by either polar or nematic formalism. Here, we introduce a minimal model that integrates self-propulsion into the active nematic framework.
de Graaf Sousa N +3 more
europepmc +4 more sources