２０１７年２月１４日 Dr. Ankita Pandey （終了）

日時：２０１７年２月１４日（火）　１４：３０〜１６：００
場所：首都大学東京　８号館３００号室
講師：Dr. Ankita Pandey (名古屋大学)
題目：Flow-induced nonequilibrium self-assembly in suspensions of stiff, apolar, active filaments

要旨：Chemomechanically active filaments, composed of elements that convert chemical energy to mechanical motion, occur in many biological and biomimetic contexts. Here we study the hydrodynamics of a suspension of stiff apolar active filaments, with a permanent distribution of stresslets along its length, using the lattice Boltzmann method. These stiff active filaments cannot translate or rotate in isolation (and hence are apolar) but do so in the collective fluid flow of other filaments. Lateral hydrodynamic attractions in extensile filaments lead, independent of volume fraction, to anisotropic aggregates which translate and rotate. Lateral hydrodynamic repulsions in contractile filaments lead to microstructured states, where the degree of clustering increases with volume fraction and the filament motion is always diffusive. Our results demonstrate that the interplay of active hydrodynamic flows and anisotropic excluded volume interactions provides a generic non-equilibrium mechanism for hierarchical self-assembly of active soft matter.

[1] Ankita Pandey, P. B. Sunil Kumar, R. Adhikari, Soft Matter 12, 9068 (2016).