Orientational order of motile defects in active nematics

DeCamp, Stephen J.; Redner, Gabriel S.; Baskaran, Aparna; Hagan, Michael F.; Dogic, Zvonimir

doi:10.1038/nmat4387

Title: Orientational order of motile defects in active nematics

Abstract

The study of equilibrium liquid crystals has led to fundamental insights into the nature of ordered materials, as well as many practical applications such as display technologies. Active nematics are a fundamentally different class of liquid crystals, which are driven away from equilibrium by the autonomous motion of their constituent rodlike particles. This internally-generated activity powers the continuous creation and annihilation of topological defects, leading to complex streaming flows whose chaotic dynamics appear to destroy long-range order. Here, we study these dynamics in experimental and computational realizations of active nematics. By tracking thousands of defects over centimeter distances in microtubule-based active nematics, we identify a non-equilibrium phase characterized by system-spanning orientational order of defects. This emergent order persists over hours despite defect lifetimes of only seconds. Lastly, similar dynamical structures are observed in coarse-grained simulations, suggesting that defect-ordered phases are a generic feature of active nematics.

Authors:

DeCamp, Stephen J. ^[1]; Redner, Gabriel S. ^[1]; Baskaran, Aparna ^[1]; Hagan, Michael F. ^[1]; Dogic, Zvonimir ^[1]

Brandeis Univ., Waltham, MA (United States)

Publication Date:: Mon Aug 17 00:00:00 EDT 2015

Research Org.:: Brandeis Univ., Waltham, MA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1347135

Grant/Contract Number:: SC0010432

Resource Type:: Accepted Manuscript

Journal Name:: Nature Materials

Additional Journal Information:: Journal Volume: 14; Journal Issue: 11; Journal ID: ISSN 1476-1122

Publisher:: Nature Publishing Group

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    DeCamp, Stephen J., Redner, Gabriel S., Baskaran, Aparna, Hagan, Michael F., and Dogic, Zvonimir. Orientational order of motile defects in active nematics.  United States: N. p., 2015. 
Web.  doi:10.1038/nmat4387.

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                    DeCamp, Stephen J., Redner, Gabriel S., Baskaran, Aparna, Hagan, Michael F., & Dogic, Zvonimir. Orientational order of motile defects in active nematics.  United States.  https://doi.org/10.1038/nmat4387

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                    DeCamp, Stephen J., Redner, Gabriel S., Baskaran, Aparna, Hagan, Michael F., and Dogic, Zvonimir. Mon .  
"Orientational order of motile defects in active nematics".  United States.  https://doi.org/10.1038/nmat4387.  https://www.osti.gov/servlets/purl/1347135.

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@article{osti_1347135,

  title        = {Orientational order of motile defects in active nematics},

  author       = {DeCamp, Stephen J. and Redner, Gabriel S. and Baskaran, Aparna and Hagan, Michael F. and Dogic, Zvonimir},

  abstractNote = {The study of equilibrium liquid crystals has led to fundamental insights into the nature of ordered materials, as well as many practical applications such as display technologies. Active nematics are a fundamentally different class of liquid crystals, which are driven away from equilibrium by the autonomous motion of their constituent rodlike particles. This internally-generated activity powers the continuous creation and annihilation of topological defects, leading to complex streaming flows whose chaotic dynamics appear to destroy long-range order. Here, we study these dynamics in experimental and computational realizations of active nematics. By tracking thousands of defects over centimeter distances in microtubule-based active nematics, we identify a non-equilibrium phase characterized by system-spanning orientational order of defects. This emergent order persists over hours despite defect lifetimes of only seconds. Lastly, similar dynamical structures are observed in coarse-grained simulations, suggesting that defect-ordered phases are a generic feature of active nematics.},

  doi          = {10.1038/nmat4387},

  journal      = {Nature Materials},

  number       = 11,

  volume       = 14,

  place        = {United States},

  year         = {Mon Aug 17 00:00:00 EDT 2015},

  month        = {Mon Aug 17 00:00:00 EDT 2015}

}

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DOI: 10.1101/505669

Effects of spatial dimensionality and steric interactions on microtubule-motor self-organization.
text, January 2019

Rickman, Jamie; Nédélec, François; Surrey, Thomas
Apollo - University of Cambridge Repository
DOI: 10.17863/cam.40940

Effects of spatial dimensionality and steric interactions on microtubule-motor self-organization.
text, January 2020

Rickman, Jamie; Nédélec, François; Surrey, Thomas
The Francis Crick Institute
DOI: 10.25418/crick.11538282.v1

Emergence of active nematics in chaining bacterial biofilms
text, January 2019

Yaman, Yusuf I.; Demir, Esin; Vetter, Roman
ETH Zurich
DOI: 10.3929/ethz-b-000346142

Effects of spatial dimensionality and steric interactions on microtubule-motor self-organization.
text, January 2020

Rickman, Jamie; Nédélec, François; Surrey, Thomas
The Francis Crick Institute
DOI: 10.25418/crick.11538282

Stabilization of active matter by flow-vortex lattices and defect ordering
text, January 2015

Doostmohammadi, Amin; Adamer, Michael F.; Thampi, Sumesh P.
arXiv
DOI: 10.48550/arxiv.1505.04199

Instabilities, defects, and defect ordering in an overdamped active nematic
preprint, January 2015

Putzig, Elias; Redner, Gabriel S.; Baskaran, Arvind
arXiv
DOI: 10.48550/arxiv.1506.03501

Antipolar ordering of topological defects in active liquid crystals
text, January 2015

Oza, Anand U.; Dunkel, Jörn
arXiv
DOI: 10.48550/arxiv.1507.01055

Hydrodynamic instabilities in active cholesteric liquid crystals
text, January 2017

Whitfield, Carl A.; Adhyapak, Tapan Chandra; Tiribocchi, Adriano
arXiv
DOI: 10.48550/arxiv.1701.05022

The interplay between activity and filament flexibility determines the emergent properties of active nematics
preprint, January 2017

Joshi, Abhijeet; Putzig, Elias; Baskaran, Aparna
arXiv
DOI: 10.48550/arxiv.1711.05714

Collective Dynamics of Self-propelled Semiflexible Filaments
preprint, January 2018

Duman, Ozer; Isele-Holder, Rolf E.; Elgeti, Jens
arXiv
DOI: 10.48550/arxiv.1802.07480

How dissipation constrains fluctuations in nonequilibrium liquids: Diffusion, structure and biased interactions
text, January 2018

Tociu, Laura; Fodor, Étienne; Nemoto, Takahiro
arXiv
DOI: 10.48550/arxiv.1808.07838

Activity driven orientational order in active nematic liquid crystals on an anisotropic substrate
text, January 2018

Pearce, D. J. G.
arXiv
DOI: 10.48550/arxiv.1810.04549

Tunable structure and dynamics of active liquid crystals
text, January 2018

Kumar, Nitin; Zhang, Rui; de Pablo, Juan J.
arXiv
DOI: 10.48550/arxiv.1810.07124

Self-organized dynamics and the transition to turbulence of confined active nematics
text, January 2018

Opathalage, Achini; Norton, Michael M.; Juniper, Michael P. N.
arXiv
DOI: 10.48550/arxiv.1810.09032

Structure and dynamics of a self-propelled semiflexible filament
text, January 2019

Anand, Shalabh K.; Singh, Sunil P.
arXiv
DOI: 10.48550/arxiv.1902.04761

Reconfigurable Flows and Defect Landscape of Confined Active Nematics
preprint, January 2019

Hardoüin, Jérôme; Hughes, Rian; Doostmohammadi, Amin
arXiv
DOI: 10.48550/arxiv.1903.01787

Understanding dense active nematics from microscopic models
text, January 2019

Patelli, Aurelio; Djafer-Cherif, Ilyas; Aranson, Igor S.
arXiv
DOI: 10.48550/arxiv.1904.12708

Lattice Boltzmann Methods and Active Fluids
text, January 2019

Carenza, Livio Nicola; Gonnella, Giuseppe; Lamura, Antonio
arXiv
DOI: 10.48550/arxiv.1906.01129

Topology of three-dimensional active nematic turbulence confined to droplets
text, January 2019

Čopar, Simon; Aplinc, Jure; Kos, Žiga
arXiv
DOI: 10.48550/arxiv.1908.00904

Optically enriched and guided dynamics of active skyrmions
text, January 2019

Sohn, Hayley R. O.; Liu, Changda D.; Voinescu, Robert
arXiv
DOI: 10.48550/arxiv.1911.04640

Data-driven quantitative modeling of bacterial active nematics
text, January 2020

Li, He; Shi, Xia-qing; Huang, Mingji
arXiv
DOI: 10.48550/arxiv.2011.07894

A bisector Line Field Approach to Interpolation of Orientation Fields
journal, September 2020

Boizot, Nicolas; Sacchelli, Ludovic
Journal of Mathematical Imaging and Vision, Vol. 63, Issue 1
DOI: 10.1007/s10851-020-00990-5

Dynamic structure of active nematic shells
journal, November 2016

Zhang, Rui; Zhou, Ye; Rahimi, Mohammad
Nature Communications, Vol. 7, Issue 1
DOI: 10.1038/ncomms13483

Active nematics
journal, August 2018

Doostmohammadi, Amin; Ignés-Mullol, Jordi; Yeomans, Julia M.
Nature Communications, Vol. 9, Issue 1
DOI: 10.1038/s41467-018-05666-8

Schools of skyrmions with electrically tunable elastic interactions
journal, October 2019

Sohn, Hayley R. O.; Liu, Changda D.; Smalyukh, Ivan I.
Nature Communications, Vol. 10, Issue 1
DOI: 10.1038/s41467-019-12723-3

Bacteria solve the problem of crowding by moving slowly
journal, November 2020

Meacock, O. J.; Doostmohammadi, A.; Foster, K. R.
Nature Physics, Vol. 17, Issue 2
DOI: 10.1038/s41567-020-01070-6

Phase transitions on a class of generalized Vicsek-like models of collective motion
journal, April 2021

Clusella, Pau; Pastor-Satorras, Romualdo
Chaos: An Interdisciplinary Journal of Nonlinear Science, Vol. 31, Issue 4
DOI: 10.1063/5.0046926

Tunable corrugated patterns in an active nematic sheet
journal, October 2019

Senoussi, Anis; Kashida, Shunnichi; Voituriez, Raphael
Proceedings of the National Academy of Sciences, Vol. 116, Issue 45
DOI: 10.1073/pnas.1912223116

Antipolar ordering of topological defects in active liquid crystals
journal, September 2016

Oza, Anand U.; Dunkel, Jörn
New Journal of Physics, Vol. 18, Issue 9
DOI: 10.1088/1367-2630/18/9/093006

Deriving hydrodynamic equations from dry active matter models in three dimensions
journal, September 2018

Mahault, Benoît; Patelli, Aurelio; Chaté, Hugues
Journal of Statistical Mechanics: Theory and Experiment, Vol. 2018, Issue 9
DOI: 10.1088/1742-5468/aad6b5

Chronology of motor-mediated microtubule streaming
posted_content, December 2018

Ravichandran, Arvind; Duman, Özer; Hoore, Masoud
eLife
DOI: 10.1101/505669

Gliding filament system giving both global orientational order and clusters in collective motion
journal, March 2020

Tanida, Sakurako; Furuta, Ken'ya; Nishikawa, Kaori
Physical Review E, Vol. 101, Issue 3
DOI: 10.1103/physreve.101.032607

Tunable structure and dynamics of active liquid crystals
journal, October 2018

Kumar, Nitin; Zhang, Rui; de Pablo, Juan J.
Science Advances, Vol. 4, Issue 10
DOI: 10.1126/sciadv.aat7779

Optically enriched and guided dynamics of active skyrmions
journal, January 2020

Sohn, Hayley R. O.; Liu, Changda D.; Voinescu, Robert
Optics Express, Vol. 28, Issue 5
DOI: 10.1364/oe.382845

Defects in Active Nematics – Algorithms for Identification and Tracking
journal, February 2021

Wenzel, Dennis; Nestler, Michael; Reuther, Sebastian
Computational Methods in Applied Mathematics, Vol. 21, Issue 3
DOI: 10.1515/cmam-2020-0021

Stabilization of active matter by flow-vortex lattices and defect ordering
text, January 2015

Doostmohammadi, Amin; Adamer, Michael F.; Thampi, Sumesh P.
arXiv
DOI: 10.48550/arxiv.1505.04199

Active colloids in complex fluids
text, January 2016

Patteson, Alison E.; Gopinath, Arvind; Arratia, Paulo E.
arXiv
DOI: 10.48550/arxiv.1602.02693

Generic singularities of line fields on 2D manifolds
preprint, January 2016

Boscain, Ugo; Sacchelli, Ludovic; Sigalotti, Mario
arXiv
DOI: 10.48550/arxiv.1605.06295

Topological defect launches 3D mound in the active nematic sheet of neural progenitors
text, January 2016

Kawaguchi, Kyogo; Kageyama, Ryoichiro; Sano, Masaki
arXiv
DOI: 10.48550/arxiv.1605.06470

Curvature controlled defect dynamics in topological active nematics
preprint, January 2017

Alaimo, Francesco; Köhler, Christian; Voigt, Axel
arXiv
DOI: 10.48550/arxiv.1703.03707

Order-disorder transition in active nematic: A lattice model study
text, January 2017

Das, Rakesh; Kumar, Manoranjan; Mishra, Shradha
arXiv
DOI: 10.48550/arxiv.1707.07850

Controlling motile disclinations in a thick nematogenic material with an electric field
preprint, January 2017

Bhattacharjee, Amit Kumar
arXiv
DOI: 10.48550/arxiv.1707.09703

Twist-induced crossover from 2D to 3D turbulence in active nematics
text, January 2018

Shendruk, Tyler N.; Thijssen, Kristian; Yeomans, Julia M.
arXiv
DOI: 10.48550/arxiv.1803.02093

Spontaneous Circulation of Active Microtubules Confined by Optical Traps
preprint, January 2018

Martin, Stephen E.; Brunner, Matthew E.; Deutsch, Joshua M.
arXiv
DOI: 10.48550/arxiv.1808.09546

Emergence of active nematics in bacterial biofilms
text, January 2018

Yaman, Yusuf Ilker; Demir, Esin; Vetter, Roman
arXiv
DOI: 10.48550/arxiv.1811.12076

Controlling Organization and Forces in Active Matter Through Optically-Defined Boundaries
text, January 2018

Ross, Tyler D.; Lee, Heun Jin; Qu, Zijie
arXiv
DOI: 10.48550/arxiv.1812.09418

Filamentous Active Matter: Band Formation, Bending, Buckling, and Defects
preprint, January 2019

Vliegenthart, Gerrit; Ravichandran, Arvind; Ripoll, Marisol
arXiv
DOI: 10.48550/arxiv.1902.07904

Reconfigurable Flows and Defect Landscape of Confined Active Nematics
preprint, January 2019

Hardoüin, Jérôme; Hughes, Rian; Doostmohammadi, Amin
arXiv
DOI: 10.48550/arxiv.1903.01787

A particle-field representation unifies paradigms in active matter
text, January 2019

Großmann, Robert; Aranson, Igor S.; Peruani, Fernando
arXiv
DOI: 10.48550/arxiv.1906.00277

Lattice Boltzmann Methods and Active Fluids
text, January 2019

Carenza, Livio Nicola; Gonnella, Giuseppe; Lamura, Antonio
arXiv
DOI: 10.48550/arxiv.1906.01129

Inertia drives a flocking phase transition in viscous active fluids
text, January 2019

Chatterjee, Rayan; Rana, Navdeep; Simha, R. Aditi
arXiv
DOI: 10.48550/arxiv.1907.03492

Predictive local field theory for interacting active Brownian spheres in two spatial dimensions
text, January 2019

Bickmann, Jens; Wittkowski, Raphael
arXiv
DOI: 10.48550/arxiv.1909.03369

Driven Topological Transitions in Active Nematic Films
preprint, January 2019

Rivas, David P.; Shendruk, Tyler N.; Henry, Robert R.
arXiv
DOI: 10.48550/arxiv.1910.14456

Topological defects of integer charge in cell monolayers
preprint, January 2019

Endresen, Kirsten D.; Kim, MinSu; Serra, Francesca
arXiv
DOI: 10.48550/arxiv.1912.03271

Motility-induced buckling and glassy dynamics regulate three-dimensional transitions of bacterial monolayers
preprint, January 2020

Takatori, Sho C.; Mandadapu, Kranthi K.
arXiv
DOI: 10.48550/arxiv.2003.05618

Confinement controlled bend instability of three-dimensional active fluids
text, January 2020

Chandrakar, Pooja; Varghese, Minu; Aghvami, S. Ali
arXiv
DOI: 10.48550/arxiv.2007.03017

Optimal Control of Active Nematics
text, January 2020

Norton, Michael M.; Grover, Piyush; Hagan, Michael F.
arXiv
DOI: 10.48550/arxiv.2007.14837

Data-driven quantitative modeling of bacterial active nematics
text, January 2020

Li, He; Shi, Xia-qing; Huang, Mingji
arXiv
DOI: 10.48550/arxiv.2011.07894

Active boundary layers
text, January 2020

Hardoüin, Jérôme; Doré, Claire; Laurent, Justine
arXiv
DOI: 10.48550/arxiv.2012.02740

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Title: Orientational order of motile defects in active nematics

Abstract

Citation Formats

Long-Lived Giant Number Fluctuations in a Swarming Granular Nematic journal, July 2007

Perfect nematic order in confined monolayers of spindle-shaped cells journal, January 2014

Living liquid crystals journal, January 2014

Physical basis of spindle self-organization journal, December 2014

Hydrodynamic Fluctuations and Instabilities in Ordered Suspensions of Self-Propelled Particles journal, July 2002

Spontaneous motion in hierarchically assembled active matter journal, November 2012

Defect Annihilation and Proliferation in Active Nematics journal, May 2013

Velocity Correlations in an Active Nematic journal, September 2013

Instabilities and topological defects in active nematics journal, January 2014

Multiscale Polar Theory of Microtubule and Motor-Protein Assemblies journal, January 2015

Large-Scale Chaos and Fluctuations in Active Nematics journal, July 2014

Cosmology in the Laboratory: Defect Dynamics in Liquid Crystals journal, March 1991

Dislocation-mediated melting in two dimensions journal, March 1979

Abrikosov dislocation lattice in a model of the cholesteric – to – smectic- A transition journal, August 1988

The flux-line lattice in superconductors journal, November 1995

Long-Range Order in a Two-Dimensional Dynamical XY Model: How Birds Fly Together journal, December 1995

Hydrodynamics and phases of flocks journal, July 2005

Collective motion journal, August 2012

Hydrodynamics of soft active matter journal, July 2013

Living Crystals of Light-Activated Colloidal Surfers journal, January 2013

Structure and Dynamics of a Phase-Separating Active Colloidal Fluid journal, January 2013

Defect-Mediated Phase Transitions in Active Soft Matter journal, April 2014

Meso-scale turbulence in living fluids journal, August 2012

Spontaneous symmetry breaking in active droplets provides a generic route to motility journal, July 2012

Topology and dynamics of active nematic vesicles journal, September 2014

Self-organization of microtubules and motors journal, September 1997

Synchrotron X-ray Diffraction Study of Microtubules Buckling and Bundling under Osmotic Stress: A Probe of Interprotofilament Interactions journal, November 2004

Measuring Cohesion between Macromolecular Filaments One Pair at a Time: Depletion-Induced Microtubule Bundling journal, April 2015

Microtubule organization by the antagonistic mitotic motors kinesin-5 and kinesin-14 journal, May 2010

Techniques for fast and sensitive measurements of two-dimensional birefringence distributions journal, January 2003

Phase behavior of two-dimensional hard rod fluids journal, June 2000

Topological structure dynamics revealing collective evolution in active nematics journal, December 2013

Living Liquid Crystals journal, January 2014

Meso-scale turbulence in living fluids text, January 2012

Structure and Dynamics of a Phase-Separating Active Colloidal Fluid journal, January 2013

Collective motion text, January 2010

Spontaneous motion in hierarchically assembled active matter text, January 2013

Velocity Correlations in an Active Nematic text, January 2013

Defect annihilation and proliferation in active nematics text, January 2013

Defect-Mediated Phase Transitions in Active Soft Matter text, January 2014

Topology and Dynamics of Active Nematic Vesicles text, January 2014

Hydrodynamic fluctuations and instabilities in ordered suspensions of self-propelled particles text, January 2001

Long-lived Giant Number Fluctuations in a Swarming Granular Nematic text, January 2006

The Flux-Line Lattice in Superconductors text, January 1995

Living Crystals of Light-Activated Colloidal Surfers journal, January 2013

Collective motion text, January 2010

Spontaneous symmetry breaking in active droplets provides a generic route to motility text, January 2012

Velocity Correlations in an Active Nematic text, January 2013

Meso-scale turbulence in living fluids text, January 2012

Cytoskeletal and Actin‐Based Polymerization Motors and Their Role in Minimal Cell Design journal, April 2019

Biological Tissues as Active Nematic Liquid Crystals journal, August 2018

Active matter at the interface between materials science and cell biology journal, July 2017

Topological defects control collective dynamics in neural progenitor cell cultures journal, April 2017

Stabilization of active matter by flow-vortex lattices and defect ordering journal, February 2016

Dynamic structure of active nematic shells journal, November 2016

Hidden topological constellations and polyvalent charges in chiral nematic droplets journal, February 2017

Topological defects in confined populations of spindle-shaped cells journal, September 2016

Curvature-induced defect unbinding and dynamics in active nematic toroids journal, October 2017

Active nematics journal, August 2018

Entropy production rate is maximized in non-contractile actomyosin journal, November 2018

Emergence of active nematics in chaining bacterial biofilms journal, May 2019

Schools of skyrmions with electrically tunable elastic interactions journal, October 2019

New frontiers for the materials genome initiative journal, April 2019

Topological chaos in active nematics journal, August 2019

Curvature controlled defect dynamics in topological active nematics journal, July 2017

Reconfigurable flows and defect landscape of confined active nematics journal, October 2019

Dynamics of self-propelled filaments pushing a load journal, January 2016

Smectic monolayer confined on a sphere: topology at the particle scale journal, January 2017

Emergent topological phenomena in active polymeric fluids journal, January 2019

Active matter invasion journal, January 2019

Encapsulation of the cytoskeleton: towards mimicking the mechanics of a cell journal, January 2019

Electric field-induced crossover from 3D to 2D topological defects in a nematic liquid crystal: experimental verification journal, January 2020

Control of active liquid crystals with a magnetic field journal, May 2016

Data-driven quantitative modeling of bacterial active nematics journal, December 2018

Self-organized dynamics and the transition to turbulence of confined active nematics journal, February 2019

Tunable corrugated patterns in an active nematic sheet journal, October 2019

Assembly of colloidal particles in solution journal, October 2018

Long-Lived Giant Number Fluctuations in a Swarming Granular Nematic
journal, July 2007

Perfect nematic order in confined monolayers of spindle-shaped cells
journal, January 2014

Living liquid crystals
journal, January 2014

Physical basis of spindle self-organization
journal, December 2014

Hydrodynamic Fluctuations and Instabilities in Ordered Suspensions of Self-Propelled Particles
journal, July 2002

Spontaneous motion in hierarchically assembled active matter
journal, November 2012

Defect Annihilation and Proliferation in Active Nematics
journal, May 2013

Velocity Correlations in an Active Nematic
journal, September 2013

Instabilities and topological defects in active nematics
journal, January 2014

Multiscale Polar Theory of Microtubule and Motor-Protein Assemblies
journal, January 2015

Large-Scale Chaos and Fluctuations in Active Nematics
journal, July 2014

Cosmology in the Laboratory: Defect Dynamics in Liquid Crystals
journal, March 1991

Dislocation-mediated melting in two dimensions
journal, March 1979

Abrikosov dislocation lattice in a model of the cholesteric – to – smectic- A transition
journal, August 1988

The flux-line lattice in superconductors
journal, November 1995

Long-Range Order in a Two-Dimensional Dynamical $XY$ Model: How Birds Fly Together
journal, December 1995

Hydrodynamics and phases of flocks
journal, July 2005

Collective motion
journal, August 2012

Hydrodynamics of soft active matter
journal, July 2013

Living Crystals of Light-Activated Colloidal Surfers
journal, January 2013

Structure and Dynamics of a Phase-Separating Active Colloidal Fluid
journal, January 2013

Defect-Mediated Phase Transitions in Active Soft Matter
journal, April 2014

Meso-scale turbulence in living fluids
journal, August 2012

Spontaneous symmetry breaking in active droplets provides a generic route to motility
journal, July 2012

Topology and dynamics of active nematic vesicles
journal, September 2014

Self-organization of microtubules and motors
journal, September 1997

Synchrotron X-ray Diffraction Study of Microtubules Buckling and Bundling under Osmotic Stress: A Probe of Interprotofilament Interactions
journal, November 2004

Measuring Cohesion between Macromolecular Filaments One Pair at a Time: Depletion-Induced Microtubule Bundling
journal, April 2015

Microtubule organization by the antagonistic mitotic motors kinesin-5 and kinesin-14
journal, May 2010

Techniques for fast and sensitive measurements of two-dimensional birefringence distributions
journal, January 2003

Phase behavior of two-dimensional hard rod fluids
journal, June 2000

Topological structure dynamics revealing collective evolution in active nematics
journal, December 2013

Living Liquid Crystals
journal, January 2014

Meso-scale turbulence in living fluids
text, January 2012

Structure and Dynamics of a Phase-Separating Active Colloidal Fluid
journal, January 2013

Collective motion
text, January 2010

Spontaneous motion in hierarchically assembled active matter
text, January 2013

Velocity Correlations in an Active Nematic
text, January 2013

Defect annihilation and proliferation in active nematics
text, January 2013

Defect-Mediated Phase Transitions in Active Soft Matter
text, January 2014

Topology and Dynamics of Active Nematic Vesicles
text, January 2014

Hydrodynamic fluctuations and instabilities in ordered suspensions of self-propelled particles
text, January 2001

Long-lived Giant Number Fluctuations in a Swarming Granular Nematic
text, January 2006

The Flux-Line Lattice in Superconductors
text, January 1995

Living Crystals of Light-Activated Colloidal Surfers
journal, January 2013

Collective motion
text, January 2010

Spontaneous symmetry breaking in active droplets provides a generic route to motility
text, January 2012

Velocity Correlations in an Active Nematic
text, January 2013

Meso-scale turbulence in living fluids
text, January 2012

Cytoskeletal and Actin‐Based Polymerization Motors and Their Role in Minimal Cell Design
journal, April 2019

Biological Tissues as Active Nematic Liquid Crystals
journal, August 2018

Active matter at the interface between materials science and cell biology
journal, July 2017

Topological defects control collective dynamics in neural progenitor cell cultures
journal, April 2017

Stabilization of active matter by flow-vortex lattices and defect ordering
journal, February 2016

Dynamic structure of active nematic shells
journal, November 2016

Hidden topological constellations and polyvalent charges in chiral nematic droplets
journal, February 2017

Topological defects in confined populations of spindle-shaped cells
journal, September 2016

Curvature-induced defect unbinding and dynamics in active nematic toroids
journal, October 2017

Active nematics
journal, August 2018

Entropy production rate is maximized in non-contractile actomyosin
journal, November 2018

Emergence of active nematics in chaining bacterial biofilms
journal, May 2019

Schools of skyrmions with electrically tunable elastic interactions
journal, October 2019

New frontiers for the materials genome initiative
journal, April 2019

Topological chaos in active nematics
journal, August 2019

Curvature controlled defect dynamics in topological active nematics
journal, July 2017

Reconfigurable flows and defect landscape of confined active nematics
journal, October 2019

Dynamics of self-propelled filaments pushing a load
journal, January 2016

Smectic monolayer confined on a sphere: topology at the particle scale
journal, January 2017

Emergent topological phenomena in active polymeric fluids
journal, January 2019

Active matter invasion
journal, January 2019

Encapsulation of the cytoskeleton: towards mimicking the mechanics of a cell
journal, January 2019

Electric field-induced crossover from 3D to 2D topological defects in a nematic liquid crystal: experimental verification
journal, January 2020

Control of active liquid crystals with a magnetic field
journal, May 2016

Data-driven quantitative modeling of bacterial active nematics
journal, December 2018

Self-organized dynamics and the transition to turbulence of confined active nematics
journal, February 2019

Tunable corrugated patterns in an active nematic sheet
journal, October 2019

Assembly of colloidal particles in solution
journal, October 2018

Antipolar ordering of topological defects in active liquid crystals
journal, September 2016

Spontaneous topological charging of tactoids in a living nematic
journal, April 2018

Effects of spatial dimensionality and steric interactions on microtubule-motor self-organization
journal, April 2019