Activity Induced Rigidity of Liquid Droplets

Kaili Xie, Benjamin Gorin, Rory T. Cerbus, Laura Alvarez, Jean-Michel Rampnoux, and Hamid Kellay
Phys. Rev. Lett. 129, 138001 – Published 21 September 2022
PDFHTMLExport Citation

Abstract

Here we show that encapsulating active Janus particles within a drop renders it more resistant to deformation. This drop is deformed under the action of an extensional flow. Such deformation is primarily resisted by the drop interfacial tension. When the particles are active under the action of laser illumination, the deformation decreases signaling an increase in effective tension or Laplace pressure. This increase is attributed to the activity of the particles. Our results using numerous drop sizes, particle number densities, and active velocities show that the obtained increase agrees surprisingly well, over an extended range, with a standard expression for the pressure engendered by an ensemble of active particles, proposed years ago but not tested yet in three dimensions.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 8 December 2021
  • Revised 18 February 2022
  • Accepted 25 August 2022

DOI:https://doi.org/10.1103/PhysRevLett.129.138001

© 2022 American Physical Society

Physics Subject Headings (PhySH)

Polymers & Soft Matter

Authors & Affiliations

Kaili Xie1, Benjamin Gorin1, Rory T. Cerbus1, Laura Alvarez2, Jean-Michel Rampnoux1, and Hamid Kellay1,3,*

  • 1Université de Bordeaux, CNRS, LOMA, UMR 5798, F-33405 Talence, France
  • 2Université de Bordeaux, CNRS, CRPP, UMR 5031, 33600 Pessac, France
  • 3Institut Universitaire de France, 75005 Paris, France

  • *hamid.kellay@u-bordeaux.fr

Article Text (Subscription Required)

Click to Expand

Supplemental Material (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 129, Iss. 13 — 23 September 2022

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×