Rheology of giant vesicles: a micropipette study.

  title={Rheology of giant vesicles: a micropipette study.},
  author={Nathalie Fa and Carlos Manuel Marques and Eduardo Mendes and A P Schr{\"o}der},
  journal={Physical review letters},
  volume={92 10},
We develop a micropipette rheometer to study the effect of oscillatory shear flow on the spontaneous fluctuations of phospholipid bilayers. Our results on giant vesicles show that oscillatory shear flow leads to a suppression of membrane fluctuations. They also imply that the Helfrich equation is modified in the presence of the flow. This equation, a fundamental constitutive relation between the amount of area stored in the fluctuations and the membrane tension, must be supplemented under… 

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