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Explore the fascinating phenomenon of activity-induced rigidity in liquid droplets through this 23-minute conference talk. Delve into the research presented by Hamid Kellay at the Workshop on "Transport Properties in Soft Matter Systems" held at the Erwin Schrödinger International Institute for Mathematics and Physics. Discover how encapsulating active Janus particles within a droplet increases its resistance to deformation under extensional flow. Examine the relationship between particle activity, induced by laser illumination, and the observed decrease in droplet deformation. Analyze the findings that demonstrate an increase in effective tension or Laplace pressure, attributed to particle activity. Learn how the results, obtained using various drop sizes, particle number densities, and active velocities, align with a standard expression for pressure generated by active particle ensembles in three dimensions. Gain insights into this groundbreaking research that tests and validates a long-standing theoretical concept in soft matter physics.
