Chemically Triggered Ejection of Membrane Tubules Controlled by Intermonolayer Friction - Sorbonne Université
Journal Articles Physical Review Letters Year : 2009

Chemically Triggered Ejection of Membrane Tubules Controlled by Intermonolayer Friction

Jean-Baptiste Fournier
Nada Khalifat
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  • PersonId : 881654
Nicolas Puff
Miglena Angelova

Abstract

We report a chemically driven membrane shape instability that triggers the ejection of a tubule growing exponentially toward a chemical source. The instability is initiated by a dilation of the exposed monolayer, which is coupled to the membrane spontaneous curvature and slowed down by intermonolayer friction. Our experiments are performed by local delivery of a basic pH solution to a giant vesicle. Quantitative fits of the data give an intermonolayer friction coefficient b approximately 2x10;{9} J s/m;{4}. The exponential growth of the tubule may be explained by a Marangoni stress yielding a pulling force proportional to its length.
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Dates and versions

hal-02443688 , version 1 (06-03-2020)

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Jean-Baptiste Fournier, Nada Khalifat, Nicolas Puff, Miglena Angelova. Chemically Triggered Ejection of Membrane Tubules Controlled by Intermonolayer Friction. Physical Review Letters, 2009, 102 (1), pp.018102. ⟨10.1103/PhysRevLett.102.018102⟩. ⟨hal-02443688⟩
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