Results 51 to 60 of about 3,142,115 (200)
Defect self-propulsion in active nematic films with spatially varying activity
Royal Society Open Science, 2023 We study the dynamics of topological defects in active nematic films with spatially varying activity and consider two set-ups: (i) a constant activity gradient and (ii) a sharp jump in activity.
Jonas Rønning +2 more
doaj +1 more source
How reciprocity impacts ordering and phase separation in active nematics? [PDF]
, 2023 Active nematics undergo spontaneous symmetry breaking and show phase separation instability. Within the prevailing notion that macroscopic properties depend only on symmetries and conservation laws, different microscopic models are used out of ...
Chaudhuri, Debasish, Sinha, Arpan
core +1 more source
Mesoscopic theory for fluctuating active nematics
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
doaj +1 more source
Understanding Dense Active Nematics from Microscopic Models [PDF]
, 2019 We study dry, dense active nematics at both particle and continuous levels. Specifically, extending the Boltzmann-Ginzburg-Landau approach, we derive well-behaved hydrodynamic equations from a Vicsek-style model with nematic alignment and pairwise ...
Patelli, Aurelio +6 more
core +1 more source
Hydrodynamics of Active Defects: From Order to Chaos to Defect Ordering
Physical Review X, 2019 Topological defects play a prominent role in the physics of two-dimensional materials. When driven out of equilibrium in active nematics, disclinations can acquire spontaneous self-propulsion and drive self-sustained flows upon proliferation.
Suraj Shankar, M. Cristina Marchetti
doaj +1 more source
A unified field theory of topological defects and non-linear local excitations
npj Computational Materials, 2023 Topological defects and smooth excitations determine the properties of systems showing collective order. We introduce a generic non-singular field theory that comprehensively describes defects and excitations in systems with O(n) broken rotational ...
Vidar Skogvoll +3 more
doaj +1 more source
Nanoconfinement‐Induced Second‐Harmonic Circular Dichroism via Chirality–Ferroelectric Coupling
Advanced Functional Materials, EarlyView.Nanoconfinement of a ferroelectric nematic liquid crystal within a chiral nanoporous sponge yields an enhanced second‐harmonic generation circular dichroism (|gSHG–CD| ≈ 1.1). Polarization‐resolved analysis suggests an additional magnetic‐dipole‐associated nonlinear contribution under nanoconfinement, highlighting chirality–ferroelectric coupling as a ...
Jae‐Jin Lee +5 more
wiley +1 more source
Advanced Functional Materials, EarlyView.Inspired by skeletal muscles’ precision and endurance, CoilLCE integrates a self‐sensing liquid crystal elastomer/graphene artificial muscle with an embedded Joule‐heating copper coil, enabling closed‐loop multistage actuation with programmable intermediate states (strain accuracy of 2%), and antagonistic coordination (32% total strain). These features
Ziyun Zhang +9 more
wiley +1 more source
Defect Annihilation and Proliferation in Active Nematics
Physical Review Letters, 2013 5 pages, 4 ...
Giomi, Luca +3 more
openaire +4 more sources
Activity gradients in two- and three-dimensional active nematics
Soft Matter, 2022 We numerically investigate how spatial variations of extensile or contractile active stress affect bulk active nematic systems in two and three dimensions.
Ruske, LJ, Yeomans, JM
openaire +3 more sources