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Title: Instability of Expanding Bacterial Droplets

Abstract

Suspensions of motile bacteria or synthetic microswimmers, termed active matter, manifest a remarkable propensity for self-organization, and formation of large-scale coherent structures. Most active matter research deals with almost homogeneous in space systems and little is known about the dynamics of strongly heterogeneous active matter. Here in this paper we report on experimental and theoretical studies on the expansion of highly concentrated bacterial droplets into an ambient bacteria-free fluid. The droplet is formed beneath a rapidly rotating solid macroscopic particle inserted in the suspension. We observe vigorous instability of the droplet reminiscent of a violent explosion. The phenomenon is explained in terms of continuum first-principle theory based on the swim pressure concept. Our findings provide insights into the dynamics of active matter with strong density gradients and significantly expand the scope of experimental and analytic tools for control and manipulation of active systems.

Authors:
 [1];  [2];  [3];  [4]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
  2. Pennsylvania State Univ., University Park, PA (United States). Dept. of Biomedical Engineering
  3. California Inst. of Technology (CalTech), Pasadena, CA (United States). Division of Chemistry and Chemical Engineering
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Pennsylvania State Univ., University Park, PA (United States). Dept. of Biomedical Engineering
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
OSTI Identifier:
1459889
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 9; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES

Citation Formats

Sokolov, Andrey, Dominguez Rubio, Leonardo, Brady, John F., and Aranson, Igor S. Instability of Expanding Bacterial Droplets. United States: N. p., 2018. Web. doi:10.1038/s41467-018-03758-z.
Sokolov, Andrey, Dominguez Rubio, Leonardo, Brady, John F., & Aranson, Igor S. Instability of Expanding Bacterial Droplets. United States. doi:10.1038/s41467-018-03758-z.
Sokolov, Andrey, Dominguez Rubio, Leonardo, Brady, John F., and Aranson, Igor S. Tue . "Instability of Expanding Bacterial Droplets". United States. doi:10.1038/s41467-018-03758-z. https://www.osti.gov/servlets/purl/1459889.
@article{osti_1459889,
title = {Instability of Expanding Bacterial Droplets},
author = {Sokolov, Andrey and Dominguez Rubio, Leonardo and Brady, John F. and Aranson, Igor S.},
abstractNote = {Suspensions of motile bacteria or synthetic microswimmers, termed active matter, manifest a remarkable propensity for self-organization, and formation of large-scale coherent structures. Most active matter research deals with almost homogeneous in space systems and little is known about the dynamics of strongly heterogeneous active matter. Here in this paper we report on experimental and theoretical studies on the expansion of highly concentrated bacterial droplets into an ambient bacteria-free fluid. The droplet is formed beneath a rapidly rotating solid macroscopic particle inserted in the suspension. We observe vigorous instability of the droplet reminiscent of a violent explosion. The phenomenon is explained in terms of continuum first-principle theory based on the swim pressure concept. Our findings provide insights into the dynamics of active matter with strong density gradients and significantly expand the scope of experimental and analytic tools for control and manipulation of active systems.},
doi = {10.1038/s41467-018-03758-z},
journal = {Nature Communications},
number = ,
volume = 9,
place = {United States},
year = {2018},
month = {4}
}

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Cited by: 3 works
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Works referenced in this record:

Model for dynamical coherence in thin films of self-propelled microorganisms
journal, April 2007


The force on a boundary in active matter
journal, November 2015


Swim stress, motion, and deformation of active matter: effect of an external field
journal, January 2014


Self-Concentration and Large-Scale Coherence in Bacterial Dynamics
journal, August 2004


T HE R ICHTMYER -M ESHKOV I NSTABILITY
journal, January 2002


Catalytic Nanomotors: Remote-Controlled Autonomous Movement of Striped Metallic Nanorods
journal, January 2005

  • Kline, Timothy R.; Paxton, Walter F.; Mallouk, Thomas E.
  • Angewandte Chemie International Edition, Vol. 44, Issue 5
  • DOI: 10.1002/anie.200461890

Wall effects on a rotating sphere
journal, May 2010


Collective motion
journal, August 2012


Large-scale vortex lattice emerging from collectively moving microtubules
journal, March 2012

  • Sumino, Yutaka; Nagai, Ken H.; Shitaka, Yuji
  • Nature, Vol. 483, Issue 7390
  • DOI: 10.1038/nature10874

Real-Time Imaging of Fluorescent Flagellar Filaments
journal, May 2000


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


Nonlinear Field Equations for Aligning Self-Propelled Rods
journal, December 2012


Emergence of macroscopic directed motion in populations of motile colloids
journal, November 2013

  • Bricard, Antoine; Caussin, Jean-Baptiste; Desreumaux, Nicolas
  • Nature, Vol. 503, Issue 7474
  • DOI: 10.1038/nature12673

Spontaneous motion in hierarchically assembled active matter
journal, November 2012

  • Sanchez, Tim; Chen, Daniel T. N.; DeCamp, Stephen J.
  • Nature, Vol. 491, Issue 7424
  • DOI: 10.1038/nature11591

Meso-scale turbulence in living fluids
journal, August 2012

  • Wensink, H. H.; Dunkel, J.; Heidenreich, S.
  • Proceedings of the National Academy of Sciences, Vol. 109, Issue 36
  • DOI: 10.1073/pnas.1202032109

Acoustic trapping of active matter
journal, March 2016

  • Takatori, Sho C.; De Dier, Raf; Vermant, Jan
  • Nature Communications, Vol. 7, Issue 1
  • DOI: 10.1038/ncomms10694

Mesoscopic theory for fluctuating active nematics
journal, August 2013


Diffusion and Spatial Correlations in Suspensions of Swimming Particles
journal, June 2008


The Mechanics and Statistics of Active Matter
journal, August 2010


Polar patterns of driven filaments
journal, September 2010

  • Schaller, Volker; Weber, Christoph; Semmrich, Christine
  • Nature, Vol. 467, Issue 7311
  • DOI: 10.1038/nature09312

Orientational Order and Instabilities in Suspensions of Self-Locomoting Rods
journal, July 2007


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

  • Guillamat, Pau; Ignés-Mullol, Jordi; Sagués, Francesc
  • Proceedings of the National Academy of Sciences, Vol. 113, Issue 20
  • DOI: 10.1073/pnas.1600339113

Swim pressure on walls with curves and corners
journal, September 2015


Collective cell guidance by cooperative intercellular forces
journal, May 2011

  • Tambe, Dhananjay T.; Corey Hardin, C.; Angelini, Thomas E.
  • Nature Materials, Vol. 10, Issue 6
  • DOI: 10.1038/nmat3025

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


Physical Properties of Collective Motion in Suspensions of Bacteria
journal, December 2012


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


Concentration Dependence of the Collective Dynamics of Swimming Bacteria
journal, April 2007


Dynamic Clustering in Active Colloidal Suspensions with Chemical Signaling
journal, June 2012


Motility-Induced Phase Separation
journal, March 2015


Rapid expulsion of microswimmers by a vortical flow
journal, March 2016

  • Sokolov, Andrey; Aranson, Igor S.
  • Nature Communications, Vol. 7, Issue 1
  • DOI: 10.1038/ncomms11114

Instabilities and Pattern Formation in Active Particle Suspensions: Kinetic Theory and Continuum Simulations
journal, April 2008