Activity Induced Nematic Order in Isotropic Liquid Crystals

Sreejith Santhosh; Mehrana R. Nejad; Amin Doostmohammadi; Julia M. Yeomans; Sumesh P. Thampi

doi:10.1007/s10955-020-02497-0

Activity Induced Nematic Order in Isotropic Liquid Crystals

Sreejith Santhosh, Mehrana R. Nejad, Amin Doostmohammadi, Julia M. Yeomans, Sumesh P. Thampi^*

^*Corresponding author for this work

Biocomplexity

Research output: Contribution to journal › Journal article › Research › peer-review

25 Citations (Scopus)

Abstract

We use linear stability analysis to show that an isotropic phase of elongated particles with dipolar flow fields can develop nematic order as a result of their activity. We argue that ordering is favoured if the particles are flow-aligning and is strongest if the wavevector of the order perturbation is neither parallel nor perpendicular to the nematic director. Numerical solutions of the hydrodynamic equations of motion of an active nematic confirm the results. The instability is contrasted to the well-known hydrodynamic instability of an ordered active nematic.

Original language	English
Journal	Journal of Statistical Physics
Volume	180
Issue number	1-6
Pages (from-to)	699-709
Number of pages	11
ISSN	0022-4715
DOIs	https://doi.org/10.1007/s10955-020-02497-0
Publication status	Published - 12 Feb 2020

Keywords

Active nematics
Hydrodynamic instability
Liquid crystals
TOPOLOGICAL DEFECTS
TRANSITION
SELECTION
DYNAMICS
ONSET
FLOW

Access to Document

10.1007/s10955-020-02497-0

http://arxiv.org/pdf/1912.05201

Cite this

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title = "Activity Induced Nematic Order in Isotropic Liquid Crystals",

abstract = "We use linear stability analysis to show that an isotropic phase of elongated particles with dipolar flow fields can develop nematic order as a result of their activity. We argue that ordering is favoured if the particles are flow-aligning and is strongest if the wavevector of the order perturbation is neither parallel nor perpendicular to the nematic director. Numerical solutions of the hydrodynamic equations of motion of an active nematic confirm the results. The instability is contrasted to the well-known hydrodynamic instability of an ordered active nematic.",

keywords = "Active nematics, Hydrodynamic instability, Liquid crystals, TOPOLOGICAL DEFECTS, TRANSITION, SELECTION, DYNAMICS, ONSET, FLOW",

author = "Sreejith Santhosh and Nejad, {Mehrana R.} and Amin Doostmohammadi and Yeomans, {Julia M.} and Thampi, {Sumesh P.}",

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language = "English",

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journal = "Journal of Statistical Physics",

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TY - JOUR

T1 - Activity Induced Nematic Order in Isotropic Liquid Crystals

AU - Santhosh, Sreejith

AU - Nejad, Mehrana R.

AU - Doostmohammadi, Amin

AU - Yeomans, Julia M.

AU - Thampi, Sumesh P.

PY - 2020/2/12

Y1 - 2020/2/12

N2 - We use linear stability analysis to show that an isotropic phase of elongated particles with dipolar flow fields can develop nematic order as a result of their activity. We argue that ordering is favoured if the particles are flow-aligning and is strongest if the wavevector of the order perturbation is neither parallel nor perpendicular to the nematic director. Numerical solutions of the hydrodynamic equations of motion of an active nematic confirm the results. The instability is contrasted to the well-known hydrodynamic instability of an ordered active nematic.

AB - We use linear stability analysis to show that an isotropic phase of elongated particles with dipolar flow fields can develop nematic order as a result of their activity. We argue that ordering is favoured if the particles are flow-aligning and is strongest if the wavevector of the order perturbation is neither parallel nor perpendicular to the nematic director. Numerical solutions of the hydrodynamic equations of motion of an active nematic confirm the results. The instability is contrasted to the well-known hydrodynamic instability of an ordered active nematic.

KW - Active nematics

KW - Hydrodynamic instability

KW - Liquid crystals

KW - TOPOLOGICAL DEFECTS

KW - TRANSITION

KW - SELECTION

KW - DYNAMICS

KW - ONSET

KW - FLOW

U2 - 10.1007/s10955-020-02497-0

DO - 10.1007/s10955-020-02497-0

M3 - Journal article

VL - 180

SP - 699

EP - 709

JO - Journal of Statistical Physics

JF - Journal of Statistical Physics

SN - 0022-4715

IS - 1-6

ER -