Results 11 to 20 of about 2,992 (173)
Electrically activated ferroelectric nematic microrobots [PDF]
Nature CommunicationsFerroelectric nematic liquid crystals are fluids exhibiting spontaneous electric polarization, which is coupled to their long range orientational order. Due to their inherent property of making bound and surface charges, the free surface of ferroelectric
Marcell Tibor Máthé +4 more
doaj +5 more sources
Excitable Patterns in Active Nematics [PDF]
Physical Review Letters, 2010 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
B. Chakraborty +5 more
core +6 more sources
Defect unbinding in active nematics
Physical Review Letters, 2018 We formulate the statistical dynamics of topological defects in the active nematic phase, formed in two dimensions by a collection of self-driven particles on a substrate.
Bowick, Mark J. +3 more
core +5 more sources
Active nematics are intrinsically phase-separated [PDF]
Physical Review Letters, 2006 Two-dimensional nonequilibrium nematic steady states, as found in agitated granular-rod monolayers or films of orientable amoeboid cells, were predicted [Europhys. Lett.
Mishra, Shradha, Ramaswamy, Sriram
core +5 more sources
Active Fréedericksz Transition in Active Nematic Droplets
Physical Review XActive nematic liquid crystals have the remarkable ability to spontaneously deform and flow in the absence of any external driving force. While living materials with orientational order, such as the mitotic spindle, can self-assemble in quiescent active ...
Salman Alam +8 more
doaj +3 more sources
Mesoscopic simulations of active nematics. [PDF]
Sci Adv, 2022 Coarse-grained, mesoscale simulations are invaluable for studying soft condensed matter because of their ability to model systems in which a background solvent plays a substantial role but is not the primary interest. Such methods generally model passive solvents; however, far-from-equilibrium systems may also be composed of complex solutes suspended ...
Kozhukhov T, Shendruk TN.
europepmc +4 more sources
Discontinuous transition to active nematic turbulence [PDF]
Nature CommunicationsActive fluids exhibit chaotic flows at low Reynolds number known as active turbulence. Whereas the statistical properties of the chaotic flows are increasingly well understood, the nature of the transition from laminar to turbulent flows as activity ...
Malcolm Hillebrand, Ricard Alert
doaj +2 more sources
Spontaneous flows and quantum analogies in heterogeneous active nematic films [PDF]
Communications PhysicsIncorporating the inherent heterogeneity of living systems into models of active nematics is essential to provide a more realistic description of biological processes such as bacterial growth, cell dynamics and tissue development.
Alexander J. H. Houston +1 more
doaj +2 more sources
Wrinkling Instability in 3D Active Nematics. [PDF]
Nano Lett, 2020 In nature interactions between biopolymers and motor proteins give rise to biologically essential emergent behaviours. Besides cytoskeleton mechanics, active nematics arise from such interactions. Here we present a study on 3D active nematics made of microtubules, kinesin motors and depleting agent. It shows a rich behaviour evolving from a nematically
Strübing T +5 more
europepmc +9 more sources
Vertex model with internal dissipation enables sustained flows [PDF]
Nature CommunicationsComplex tissue flows in epithelia are driven by intra- and inter-cellular processes that generate, maintain, and coordinate mechanical forces. There has been growing evidence that cell shape anisotropy, manifested as nematic order, plays an important ...
Jan Rozman +3 more
doaj +2 more sources