Activity Induced Rigidity of Liquid Droplets.
Phys Rev Lett
; 129(13): 138001, 2022 Sep 23.
Article
em En
| MEDLINE
| ID: mdl-36206417
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.
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1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Tensão Superficial
Idioma:
En
Revista:
Phys Rev Lett
Ano de publicação:
2022
Tipo de documento:
Article
País de afiliação:
França