Dynamics of active liquid interfaces

R Adkins, I Kolvin, Z You, S Witthaus, MC Marchetti… - Science, 2022 - science.org
Controlling interfaces of phase-separating fluid mixtures is key to the creation of diverse
functional soft materials. Traditionally, this is accomplished with surface-modifying chemical …

Phase transitions and phase coexistence: equilibrium systems versus externally driven or active systems-Some perspectives

K Binder, P Virnau - Soft Materials, 2021 - Taylor & Francis
ABSTRACT A tutorial introduction to the statistical mechanics of phase transitions and phase
coexistence is presented, starting out from equilibrium systems and nonequilibrium steady …

Spatio-temporal patterning of extensile active stresses in microtubule-based active fluids

LM Lemma, M Varghese, TD Ross, M Thomson… - PNAS …, 2023 - academic.oup.com
Microtubule-based active fluids exhibit turbulent-like autonomous flows, which are driven by
the molecular motor powered motion of filamentous constituents. Controlling active stresses …

Data-driven discovery of active nematic hydrodynamics

C Joshi, S Ray, LM Lemma, M Varghese, G Sharp… - Physical review …, 2022 - APS
Active nematics can be modeled using phenomenological continuum theories that account
for the dynamics of the nematic director and fluid velocity through partial differential …

Confinement controls the bend instability of three-dimensional active liquid crystals

P Chandrakar, M Varghese, SA Aghvami, A Baskaran… - Physical review …, 2020 - APS
Spontaneous growth of long-wavelength deformations is a defining feature of active liquid
crystals. We investigate the effect of confinement on the instability of 3D active liquid crystals …

Extensile to contractile transition in active microtubule–actin composites generates layered asters with programmable lifetimes

J Berezney, BL Goode, S Fraden, Z Dogic - Proceedings of the National …, 2022 - pnas.org
We study a reconstituted composite system consisting of an active microtubule network
interdigitated with a passive network of entangled F-actin filaments. Increasing the …

Dissipation and energy propagation across scales in an active cytoskeletal material

PJ Foster, J Bae, B Lemma, J Zheng, W Ireland… - Proceedings of the …, 2023 - pnas.org
Living systems are intrinsically nonequilibrium: They use metabolically derived chemical
energy to power their emergent dynamics and self-organization. A crucial driver of these …

Competing instabilities reveal how to rationally design and control active crosslinked gels

B Najma, M Varghese, L Tsidilkovski, L Lemma… - Nature …, 2022 - nature.com
How active stresses generated by molecular motors set the large-scale mechanics of the cell
cytoskeleton remains poorly understood. Here, we combine experiments and theory to …

Microscopic interactions control a structural transition in active mixtures of microtubules and molecular motors

B Najma, WS Wei, A Baskaran, PJ Foster… - Proceedings of the …, 2024 - pnas.org
Microtubules and molecular motors are essential components of the cellular cytoskeleton,
driving fundamental processes in vivo, including chromosome segregation and cargo …

Engineering stability, longevity, and miscibility of microtubule-based active fluids

P Chandrakar, J Berezney, B Lemma, B Hishamunda… - Soft Matter, 2022 - pubs.rsc.org
Microtubule-based active matter provides insight into the self-organization of motile
interacting constituents. We describe several formulations of microtubule-based 3D active …