LMP Seminar

LMP Seminar: Shape Transformations of Vesicles Induced by Swim Pressure

  • Date: Oct 29, 2019
  • Time: 14:00 - 15:00
  • Speaker: Dr. Yao Li
  • AMOLF, Biochemical Networks, The Netherlands
  • Location: Max-Planck-Institut für Dynamik und Selbstorganisation (MPIDS)
  • Room: Riemannraum 1.40, Am Faßberg 17, Göttingen
  • Host: MPIDS / LMP
  • Contact: fanlong.meng@ds.mpg.de
While the behavior of vesicles in thermodynamic equilibrium has been studied extensively, how active forces control vesicle shape transformations is not understood. In this talk, I will present our recent study of the shape behavior of vesicles containing active Brownian particles by combining theory and simulations. We show that the combination of active forces, dimensionality and membrane bending free energy creates a plethora of novel phase transitions. At low swim pressure, the vesicle exhibits a discontinuous transition from a spherical to a prolate shape, which has no counterpart in two dimensions. At high swim pressure it exhibits stochastic spatio-temporal oscillations. In the end, I will further discuss how these findings will help to understand living and sythetic systems, e.g. cytoskeleton and bacteria.
 
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